Reproduction Essay Example | Topics and Well Written Essays - 250 words

Reproduction - Essay Example Estrogen induces oxytocin receptors in the uterine musculature while progesterone softens the cervix. Signals from the moving fetus signals greater secretion of oxytocin which initiates a positive feedback by increasing uterine contractions (Despopoulos & Silbernagl, 2003, p 303). Thus oxytocin causes rhythmic contractions of the strong uterine muscles and helping in easy birth of the birth and prevents chances of post-partum hemorrhage (Odent, 1998. Milk production after the birth of the child is initiated by another hormone called prolactin. Post-parturition, estrogen and progesterone levels fall; because of this the inhibitory action of these hormones on prolactin is removed. Prolactin then induces secretion of milk in the glands. Though oxytocin has no direct role in milk production it plays an important role in the release of milk or the reflex of â€Å"milk let-down† (Mackenna & Callander, 1997). The infant’s suckling acts as the stimulus which initiates release of oxytocin from the pituitary (Campbell & Reece, 2009, p 986). Oxytocin then induces contraction of the muscles of the mammary glands to initiate the flow of milk from the glands to the nipples under the control of prolactin. Hence, it has also been named milk ejection

Culturally Diverse Students Essay Example for Free

Culturally Diverse Students Essay Today our classrooms, just like families, are becoming more unique and blended. Teachers are tasked with effectively teaching students with disabilities and diverse cultural and linguistic backgrounds. In order for educators to meet the needs of their students, key strategies must be implemented that will positively affect their students academically and behaviorally. This paper reflects on the experience of one of these families and identifies key strategies to maximize the potential of cultural and linguistically exceptional students. Background I was lucky enough to interview a family that I have worked with over the years as a nanny. For the purposes of this paper and the anonymity of the family I am using the names Lucy and Chris (to refer to the mother I interviewed and her husband) and James (to refer to the exceptional child). Because I have been working in this family’s home for a number of years I am able to give an accurate overview of their socioeconomic status. Lucy and Chris self-identify as African-American and live in San Pedro, CA where the population is 76,415 with 59% identifying as Caucasian and 8% identifying as African American. The town can be classified as predominately middle class as the median household income is $62,422 (City Data, 2011). Lucy completed some college and works full-time as a manager of a credit union. She lives in a three-bedroom house with her oldest son, her younger son, James, who is now 15, and her husband. James is a lively young man with autism who is on the moderate/severe side of the spectrum. He is an exceptional swimmer and participates in his high school general P. E. program. He struggles with social interactions and has very little expressive language. He has learned to use a GO TALK to communicate functionally. James is very sensitive to his environment and sometimes becomes overwhelmed by loud noises and crowded spaces. Autism affects 1:88 children and the prevalence is on the rise. It is the fastest growing developmental disability in the U. S. It is five times more likely for boys to have autism than girls. It is characterized by language delays, social delays, and repetitive patterns of behavior (Facts About ASD, 2012). Lucy knows that I am in the process of getting my special education credential and that my own family member has DS-ASD. When she was interviewing me for the nanny position years ago she was nervous and unsure about letting anybody come into her home. After I told her about my background and how much I have learned from my brother she began to open up and become more comfortable with me. She has since then told me how thankful she is for me and how nice it is to have someone that understands her son. Discovering and Reacting to Disability It all started in preschool school. The teacher kept telling Lucy, â€Å"I don’t think he can hear. † And Lucy kept saying, â€Å"He can hear just fine! † The teacher kept saying the same thing so finally she took him to the doctor. This experience supports the research on professionals in early education or elementary school programs being the parent’s initial source of information about their child’s special needs (Turnball et. Al, 2011, p. 77). Denial was the first phase in the process of Lucy learning to accept her son’s autism. Lucy also said other members of her family were in denial, including her husband and father. Her father told them they â€Å"were not disciplining him enough† on multiple occasions. She did not talk about any anger, bargaining, or depression phases before finding acceptance (The Grieving Process ppt, 2013). Lucy has immense inner strength that I truly admire. After a doctor diagnosed James, Lucy and Chris told their family and her mother pushed her to get extra support. Lucy tells me she probably wouldn’t have ever done gone for it if it weren’t for her mother because they have always worked for everything they had and lively comfortably and didn’t want to ask for help. A person’s culture may affect treatment decisions and is often associated with certain socioeconomic or geographical constraints related to accessing care† (Mandell Novak, 2005, p. 113). Reaching out for support was not something the family wanted to do and because they lived in San Pedro, accessing the right services often required traveling long distances. Educators must recognize the relationship between status and our society’s symbols of success (holding a job, having a place to live, and being independent). As an educated service provider, I am always caught off guard by a family’s hesitation about pursuing services (even my own family never sought out extra help). My professional experience has ingrained in me the importance of early intervention. Many â€Å"African-American families seek help from family, friends and church groups before they will get professional help for their child (Dyches et al. , 2004)† (Litten, 2008, p. 5). Lucy’s perspective and her mother’s reaction had both been influenced by her experience with her sister, who was developmentally delayed as well. She said her mother wished she had gone and gotten services for her. But when they were growing up, Lucy said, â€Å"It wasn’t something you did. Our family was poor. We did whatever we did to survive and both of my parents worked. † Educators need to keep the roles of culture, poverty, and historical perspectives in mind as we work with these families because they have an impact on the attitudes and behaviors of families with exceptional children. In Lucy’s family growing up, there was a lack of awareness about the availability of services. As educators, we must consider the lack of awareness and the socioeconomic factors that prevent certain families from taking advantage of the services that they are entitled to. We can’t expect them to advocate if they aren’t aware of what is available. We must take on this role. Teacher strategy #1: Fairness is When a Child Gets What He/She Needs Over the years, Lucy and James struggled with the school’s changing James’ placements. It wasn’t until she came to the school to observe him and found him sitting in a corner of the classroom, on a couch, rocking back and forth for hours with no attention or demands placed on him that she decided to pull him out of the district completely. During their search for a new junior high school they came across programs that were solely focused on vocational skills. Lucy and Chris felt their son had more important academic skills to obtain before teachers started teaching him how to get a job. They didn’t expect him to be a scholar, but they did want him to have access to general reading, writing, and math curriculum. Education, rather than life skills, was more of a priority for them. They added an inclusion goal in his next IEP. James would participate in general P. E. and math or computer class. According to Kathryn Pitten, â€Å"Cultural mores may determine which treatment goals families will accept and which goals they will decide not to work towards. Also, parenting style will determine which goals are viewed as important. † (Pitten, 2008, p. 4). Teachers must be responsible for developing a classroom program that fosters the understanding and respect for individual differences and discusses what fairness means to each student. Teacher strategy #2: Develop a Positive Collaboration Between Parents and Teachers Lucy admitted that she did not take an aggressive approach to getting James all of the supports he needed. Most of the things she learned she â€Å"stumbled upon† through conversations with other parents, teachers, and paraprofessionals (all of which have worked out in their favor). She believes she has done the best she can for her son. Once again, awareness was lacking and because of that this family did not get the support they needed until much later on. This is consistent with literature addressing service accessibility in that ethnic minorities typically access services at a much lower rate than their Caucasian counterparts (Balcazar, Keys, Balcazar, 2001). Learning how the school system could work for her son was a significant stressor for her. If educators embraced the full reality of the student’s and family’s life and committed to supporting emotional and academic needs (Turnball et. Al, 2011, p. 147) this could help to bridge the gap between home and school. Letting parents know that you believe in their child is sometimes all it takes to give your family’s hope. Teacher strategy #3: Implement Culturally Responsive Teaching Ford (2012) points out that African Americans are the only involuntary minority group. African Americans live in a society where race affects every aspect of their lives. â€Å"The overrepresentation of Black students in special education has been dissected, discussed, and debated† (Ford, 2012). We need to understand the negative effects racism has on our children and be sensitive to the history of previous schooling of exceptional students. Some Moderate/Severe students, like James, are moved from program to program (several times a year). Teachers need to understand that not all children in their classroom have learned the same things and they can’t be taught in the same environment at the same time. We need to differentiate and individualize our instruction by providing a wide range of materials and utilizing several learning strategies. School strategy # 4: Ensure Each Student Can Identify With Someone One of the best things to happen to James in his freshman year of high school was joining the â€Å"Big Brothers and Sisters† program in his local community. Having a role model; someone to look up to, relate with, and rely on has made such a meaningful impact on his life. Lucy reflected on the first time James was invited to watch the local football team; â€Å"His face lit up. He jumped up and down and couldn’t contain his excitement. † Teachers need to facilitate healthy inclusive relationships school-wide. It is our job to spread awareness about disability and help all students to become sensitive to the beauty of differences. Conclusion James’ family hopes that one day he will be able to live in a supported living community with roommates but like many families with exceptional members, the future is uncertain. Teachers need to take an active role in the transition planning process and remember that culturally diverse families do not have the same values as those of the dominant culture. (Turnball et. Al, 2011, p. 89). These families deserve our utmost respect and attention. Showing parents that you are interested in their story can lead to unexpected successes. In order to truly do our jobs we must make our professional story a part of their family story.

Direct Effects of Financial Repression in India

Direct Effects of Financial Repression in India FINANCIAL REPRESSION (PAPER 7) Financial repression refers to the notion that a set of government regulations, laws, and other non-market restrictions prevent the financial intermediaries of an economy from functioning at their full capacity (McKinnon (1973) and Shaw (1973)PAPER 1). Generally, financial repression consists of three elements. First, the banking system is forced to hold government bonds and money through the imposition of high reserve and liquidity ratio requirements. This allows the government to finance budget deficits at a low or zero cost. Second, given that government revenue cannot be extracted that easily from private securities, the development of private bond and equity markets is discouraged. Finally, the banking system is characterized by interest rate ceilings to prevent competition with public sector fund raising from the private sector and to encourage low-cost investment (PAPER 1). The policies that cause financial repression include interest rate ceilings, liquidity ratio requirements, high bank reserve requirements, capital controls and restrictions on market entry into the financial sector, credit ceilings or restrictions on directions of credit allocation, and government ownership or domination of banks (PAPER 7). Economists have commonly argued that financial repression prevents the efficient allocation of capital and thereby impairs economic growth. While theoretically an economy with an efficient financial system can achieve growth and development through efficient capital allocation, McKinnon and Shaw argue that historically, many countries, including developed ones but especially developing ones, have restricted competition in the financial sector with government interventions and regulations. According to their argument, a repressed financial sector discourages both saving and investment because the rates of return are lower than what could be obtained in a competitive market. In such a system, financial intermediaries do not function at their full capacity and fail to channel saving into investment efficiently, thereby impeding the development of the overall economic system (PAPER 7). This paper aims to analyse the concept of financial repression and reasons why it is seen and detrimental to economic growthexplain sections below. Rationale for and types of financial repression The key reason for the government to implement financially repressive policies is to control fiscal resources. By having a direct control over the financial system, the government can funnel funds to itself without going through legislative procedures and more cheaply than it could when it resorts to market financing. More specifically, by restricting the behaviour of existing and potential participants of the financial markets, the government can create monopoly or captivate rents for the existing banks and also tax some of these rents so as to finance its overall budget. Existing banks may try to collude with each other and to interrupt possible liberalization policies as long as they are guaranteed their collective monopoly position in the domestic market. In some countries, governments require banks to meet high rates of the reserve ratios, and use the reserves as a method to generate revenues. Since reserves earn no interest, they function as an implicit tax on banks and restrict banks from allocating a certain portion of their portfolios to productive investments and loans. If high reserve requirements are combined with interest ceilings and protective government directives for certain borrowers, savers who are usually unaware of the requirement policy become the main taxpayers because they face reduced rates of interest on their savings. Inflation can aggravate the reserve tax because it reduces the real rates of interest. Thus, high reserves requirements make the best use of the governments monopolistic power to generate seigniorage revenue as well as to regulate reserve requirements. A variant of this policy includes required liquidity ratios; that is when banks are required to allocate a certain fraction of their deposits to holding government securities that usually yield a return lower than could be obtained in the market. Governments often impose a ceiling on the interest rate banks can offer to depositors. Interest ceilings function in the same way as price controls, and thereby provide banks with economic rents. Like high required reserve ratios, those rents benefit incumbent banks and provide tax sources for the government, paid for by savers and by borrowers or would-be-borrowers. The rents borne by the interest ceiling reduce the number of loans available in the market thereby discouraging both saving and investment. In return for allowing incumbent banks to reap rents, the government often require banks to make subsidized loans to certain borrowers for the purpose of implementing industrial policy (or simply achieving political goals). Interest ceilings in high inflation countries can victimize savers because high inflation can make the real interest rates of return negative. Financial repression also takes the form of government directives for banks to allocate credit at subsidized rates to specific firms and industries to implement industrial policy. Forcing banks to allocate credit to industries that are perceived to be strategically important for industrial policy ensures stable provision of capital rather than leaving it to decisions of disinterested banks or to efficient securities markets. It is also more cost effective than going through the public sectors budgetary process. Government directives and guidance sometimes include detailed orders and instructions on managerial issues of financial institutions to ensure that their behaviour and business is in line with industrial policy or other government policies. The Japanese Ministry of Finance (MOF) is a typical example of governments micromanagement of financial industry. Capital controls are restrictions on the inflows and outflows of capital and are also financially repressive policies. Despite their virtues, the use of capital controls can involve costs. Because of their uncompetitive nature, capital controls increases the cost of capital by creating financial autarky; limits both domestic and foreign investors ability to diversify portfolios; and helps inefficient financial institutions survive. Impacts of Financial Repression Because financial repression leads to inefficient allocation of capital, high costs of financial intermediation, and lower rates of return to savers, it is theoretically clear that financial repression inhibits growth (Roubini and Sala-i-Martin, 1992). The empirical findings on the effect of removing financial repression, i.e., financial liberalization on growth supports this view, but various channels through which liberalization spurs growth have been evidenced. The possible negative effect of financial repression on economic growth does not automatically mean that countries should adopt a laissez-faire stance on financial development and remove all regulations and controls that create financial repression. Many developing countries that liberalized their financial markets experienced crises partly because of the external shocks that financial liberalization introduces or amplifies. Financial liberalization can create short-term volatility despite its long-term gains (Kaminsky and Schmukler, 2002). Also, because of market imperfections and information asymmetries, removing all public financial regulations may not yield an optimal environment for financial development. An alternative to a financially repressive administration would be a new set of regulations to ensure market competition as well as prudential regulation and supervision. ECONOMIC THOUGHTS The literature on finance and development postulates a symbiotic relationship between the evolution of the financial system and the development of the real economy. This prediction is common to both the McKinnon-Shaw approach and the endogenous growth literature. However, while in the former financial development determines the level of steady-state output, in the latter it is a determinant of the equilibrium rate of economic growth. In the McKinnon-Shaw literature the basis for the relationship between financial and economic development is Gurley and Shaws (1955) debt-intermediation hypothesis. In this framework an increase in financial saving relative to the level of real economic activity increases the extent of financial intermediation and raises productive investment which, in turn, raises per-capita income. In these models nominal interest rate controls inhibit capital accumulation because they reduce the real rate of return on bank deposits, thereby discouraging financial saving. Moreover, higher reserve requirements also exert a negative influence on financial intermediation by increasing the wedge between lending and deposit rates. Under a competitive banking system this wedge is an increasing function of the rate of inflation. Thus higher real interest rates encourage capital accumulation and real economic activity, largely through an increase in the extent of financial intermediation. The competitive model of the banking industry are theoretically inadequate because First, in many less developed countries the banking industry is typically dominated by a small number of banks and collusive behaviour is not uncommon. Second, asymmetric information in loan markets is sufficient to generate a considerable degree of market power for lenders. Theoretical inadequacy relates to the implication of the assumptions of perfect competition, which leave little room for analyzing the behaviour of banks and their reactions to government interventions. Departure of the benchmark model from perfect competition has important implications for the way in which repressionist policies affect financial development. These effects may differ depending on the source of the departure from perfectly competitive behaviour. In the case where the departure is due to collusive behaviour, banking controls may induce banks to use non-interest-rate methods to influence the volume of bank deposits. Whenever the departure from perfect competition is due to imperfect information, the possibility of government corrective actions must be acknowledged. According to Stiglitz (1993), interest rate restrictions may be able to address moral hazard in the form of excessive risk taking by banks. Thus if one is prepared to assume that depositors perceive such restrictions as enhancing the stability of the banking system, their imposition may increase depositors willingness to hold their savings in the form of bank deposits. However, this crucially depends on how government policies are perceived by the public, which in turn relates to the existence or otherwise of good governance. Ill perceived and/or executed policies may have the opposite effect than that predicted by the market failure paradigm. Thus the success or failure of certain policies may largely depend on the effectiveness of the institutions that implement them (World Bank (1993). The endogenous growth literature offers additional channels through which financial sector policies may affect financial development, independently of the real rate of interest. In contrast to the Courakis-Stiglitz analysis, where repressionist policies may have positive effects, this literature typically predicts negative effects. The above analyses serve to suggest that the effects of certain types of interventionist policies as well as the channel through which they work may be different than has so far been recognized by much of the empirical literature. In particular, these policies may have direct effects on financial depth by: (1) changing the willingness of banks to raise deposits by non-interest-rate methods, and (2) changing the willingness of savers to supply their savings to the banking system. Thus these policies can have effects over and above-and sometimes conflicting with-those that are widely recognized in the literature. DATA ANALYSIS We focus on the economy of India for a variety of reasons. Besides the obvious reason that India is one of the most important developing economies in the world, it also has a rich history of varying types of repressionist policies which aids the statistical investigation. In the late 1950s the financial system of India was fairly liberal with no ceilings on interest rates and low reserve requirements. In the early 1960st he government tightened its control over the financial system by introducing lending rate controls, higher liquidity requirements, and by establishing state development banks for industry and agriculture. This process culminated in the nationalization of the 14 largest commercial banks in 1969. Further nationalizations took place in 1980. Interest rate controls were rigidly applied from the 1970s to the late 1980s to all types of loans and deposits. The term structure of interest rates was largely dictated by the Reserve Bank. Credit planning, a formal system of dire cted credit introduced in 1970, increasingly covered a very large percentage of total lending. Moreover, concessionary lending rates were offered to priority sectors. The late 1980s were, however, marked by the beginning of a process of gradual liberalization of the financial system. Ceilings on lending rates began to be lifted in 1988 and were completely abolished in 1989. Finally, further relaxations on directed credit and concessionary lending rates took place in 1990 and 1992. Interestingly, the index appears to reflect quite well many of the policy shifts that occurred during the sample period. According to this index, the early 1960s appear to be characterized with gradual increases in the level of financial repression. There was some stability in the mid-1960s followed by a big jump in 1969. This behaviour coincides with developments in the 1960s which culminated with the nationalization of the largest eleven banks in 1969, which allowed the Reserve Bank of India to intensify its directed credit program and to impose controls on deposit rates. The 1970s were characterized with the gradual imposition of more controls, i .e. a lending rate floor operated during 1973 and 1974, a lending rate ceiling was imposed in 1975 and remained in operation for 13 years, and reserve requirements (PAPER 3) were raised in 1976. The early 1980s saw even more controls imposed and an intensification of the directed credit program. Once again the gradual increase in the inde x follows these developments quite well. The index drops significantly in 1985, which coincides with a partial deregulation of deposit rate controls. It then rises again, reflecting the reintroduction of deposit rate controls in 1988 and a 4% increase of reserve requirements in 1989, but drops again in 1990 when the directed credit program is relaxed. Finally, there is a small drop of the index in 1991, which coincides with further deregulations of deposit rates. (PAPER 3) RECOMMENDATION (financial liberalisation) Since the break-up of the colonial empires, many developing countries suffered from stagnant economic growth, high and persistent inflation, and external imbalances under a financially repressed regime. To cope with these difficulties economic experts had advocated what they called â€Å"Financial liberalization mainly a high interest rate policy to accelerate capital accumulation, hence growth with lower rates of inflation (McKinnon (1973), Shaw (1973), Kapur (1976) and Matheison (1980)). Their argument that relaxation of the institutionally determined interest rate ceilings on bank deposit rates would lead to price stabilization and long-run growth through capital accumulation is based on the following chronology of events: (a) the higher deposit rates would cause the households to substitute away from unproductive assets (foreign currency, cash, land, commodity stocks, an so on) in favour of bank deposits; (b) this in turn would raise the availability of deposits into the banking system, and would enhance the supply of bank credit to finance firms capital requirements, and ; (c) this upsurge in investment would cause a strong supply side effect leading to higher output and lower inflation.(paper 1) CONCLUSION The main finding of this paper is that the direct effects of financial repression in India were negative and quite substantial. We would, however, advise caution in generalizing from these results to other countries. It is well known that the success of economic policies largely depends on the effectiveness of the institutions that implement them, and this clearly varies from country to country (e.g., World Bank (1993)). Thus we would not be surprised if future research showed- that the direct effects of financial repression in other countries (e.g., South Korea) were positive and significant.19 In fact, according to our theoretical analysis, the possibility of positive effects cannot be ruled out. Our conjecture is that repressionist policies may have positive effects whenever they are able to successfully address market failure. How-ever, market failure should encompass not only information-related imperfections but also those pertaining to the structure of the banking industry, as the latter may be equally important. Our results highlight a number of potentially fruitful avenues for further research. From a theoretical view point much work needs to be done to model financial repression in a framework where banks are more active than has so far been customarily assumed. Models where banks are able to influence the volume of their loanable funds may also be in the spirit of the modem banking literature, which emphasises the importance of active liability management. In such a framework it would be interesting to explore the role of market structure. A game-theoretic approach may also be taken, which could yield rich insights about the strategic aspects of financial repression. From an empirical point of view, the examination of the direct effects of financial repression in other countries is likely to be of considerable value. Furthermore, comparisons of these effects across different economies are likely to shed light on the relative effectiveness of repressi onist policies, thereby providing indirect evidence on relative levels of good governance. Finally, our results suggest that there is also considerable scope for empirical studies of bank behaviour under conditions of financial repression. (PAPER 3)

Hermes :: essays research papers fc

The fleet-footed messenger with wings on his heels and cap symbolizes fast delivery. However, Hermes was neither originally winged nor a messenger - that role was reserved for the rainbow goddess Iris (Medusa's cousin and the daughter of Thaumys and Elektra). Hermes was, instead, clever, tricky, a thief, and, with his awakening or sleep conferring wand (rhabdos), the original sandman whose descendants include a major Greek hero and a noisy, fun-loving god. Before Zeus married Hera, Maia (a daughter of the second generation Titan Atlas, who was a son of the Titan Iapetos and Okeanos' daughter Klymene) bore him a son, Hermes. Like Heracels, Hermes showed amazing skill in early years. He escaped his cradle, wandered outside, and walked from Mt. Cyllene to Pieria where he found Apollo's cattle. His natural character was to steal them. He even had a smart plan. First, he padded their feet to soften the sound, and then he drove fifty of them backwards in order to confuse search. He stopped at the Alpheios River to make the first sacrifice to the gods. To do so, he had to invent fire, or at least how to fire up it. Then he selected two of Apollo's herd, and after killing them, divided each into six parts to keep in touch with the twelve Olympians. There were, at the time, only eleven. The remaining part was for him. After completing his new ceremony, Hermes went back home. On his way, he found a tortoise that he took inside his house. Using leather strips from Apollo's herd as string, he created the first lyre. He was playing the new musical instrument when Apollo found him. Noticing the material of the string, Apollo was angry with Hermes for stealing his cattle and smart enough not to believe Hermes when he protested his innocence. Bringing together seemed impossible until the father of both gods stepped in. To make amends, Hermes gave his half-brother the tortoise shell lyre. Later, Hermes and Apollo made another exchange. Apollo gave his half-brother the Caduceus in exchange for a flute Hermes invented. Zeus realized he had to keep his smart, cattle-rustling son out of mischief, so he put him to work as god of trade and business. He gave him power over birds of sign, dogs, boars, flocks of sheep, and lions. He provided him with golden sandals, and made him messenger (angelos) to Hades.

Linguistics and Language Essay

What will be covered in this class? †¢ How do we produce and recognize speech? †¢ How do we perceive words, letters, and sentences? †¢ How do we learn and recall information from texts? †¢ How can we improve texts to make them easier to understand? †¢ How does the brain function to process language? †¢ What are the causes and effects of reading disabilities? †¢ Is there language in other species? Central themes in psycholinguistics 1) What knowledge of language is needed for us to use language? Tacit (implicit) knowledge vs. Explicit knowledge  Ã¢â‚¬ ¢ tacit: knowledge of how to perform something, but not aware of full rules †¢ explicit: knowledge of the processes of mechanisms in performing that thing 2) What cognitive processes are involved in the ordinary use of language? How do we understand a lecture, read a book, hold a conversation? Cognitive processes: perception, memory, thinking, learning Some definitions of basic components of language: Semantics: The meaning of words and sentences Syntax: The grammatical arrangement of words in a sentence or phrase Phonology: The sound pattern of language Pragmatics: How language is used in a social context  Examples from psycholinguistics Parsing garden path sentences The novice accepted the deal before he had a chance to check his finances, which put him in a state of conflict when he realized he had a straight flush. 1) The defendant examined by the lawyer turned out to be unreliable 2). The evidence examined by the lawyer turned out to be unreliable The process of parsing is the process of making decisions The effect of prior knowledge on comprehension The procedure is actually quite simple. First you arrange things into different groups. Of course, one pile may be sufficient depending on how much there is to do. If you have to go somewhere else due to lack of facilities, that is the next step; otherwise you are pretty well set. It is important not to overdo things. That is, it is better to do too few things at once than too many. In the short run this may not seem important, but complications can easily arise. A mistake can be expensive as well. At first the whole procedure will seem complicated. Soon, however, it will become just another facet of life. It is difficult to foresee any end to the necessity for this task in the immediate future, but then one never can tell. After the procedure is completed, one arranges the materials into different groups again. Then they can be put into their appropriate places. Eventually they will be used once more, and the whole cycle will then have to be repeated. However, that is part of life. Bransford & Johnson, 1973 Recall: No context: 2. 8 idea units out of a maximum of 18 Context afterwards: 2. 7 idea units Context before: 5. 8 idea units Child language development How many words do you know? Hint: Dictionary has about: 450,000 entries Test high school graduates: How many words do they know? About 45,000 english words About 60,000 including names and foreign words. The average six year old knows about 13,000 words. Learning about 10 words per day since age 1. (One every 90 minutes) How much do we have to teach children to learn language? Do you have to teach a child to walk? Is it the same way of learning a language? My teacher holded the baby rabbits and we patted them I eated my dinner A brief history of psycholinguistics Wilhem Wundt (early 1900s) Interest in mental processes of language production †¢ Sentence as the primary unit of language †¢ Speech production is the transformation of complete thought processes into sequentially organized speech segments. Behaviorism (1920s-1950s) †¢ Rejected the focus on mental processes †¢ Measurement based on objective behavior (primarily in lab animals) †¢ How does experience (reward and punishment) shape behavior? B. F. Skinner: Children learn language through shaping (correction of speech errors) Associative chain theory: A sentence consists of a chain of associations between individual words in the sentence What’s wrong with the behaviorist approach? Noam Chomsky (1950s – present) 1) Colorless green ideas sleep furiously 2) Furiously sleep ideas green colorless. 3) George picked up the baby. 4) George picked the baby up. Almost every sentence uttered is a new combination of words The Poverty of stimulus argument: There is not enough information in the language samples given to children to account for the richnes and complexity of children’s language The pattern of development is not based on parental speech but on innate language knowledge Linguistic Diversity vs. Linguistic Universals Linguistic diversity There appears to be a lot of diversity among languages Even within languages there is diversity When are two languages different? We speak the same language if we can understand each other  Exceptions: Norwegian and Swedish Cantonese and Mandarin Dialects within languages: The myth of pure language How/why do languages change? Why does there seem to be a â€Å"correct† English? Members of the dominant (most powerful) sub-culture tend to speak one dialect and may punish those who do not Linguistic Chauvinism Belief that one’s own language/dialect is the best of all possible languages Black English Vernacular (BEV) Study by William Labov Interviewed African-American street youth You know, like some people say if you’re good an’ sh*t, your spirit goin’ t’heaven . . . ‘n if you bad, your spirit goin’ to hell. Well, bullsh*t! Your spirit goin’ to hell anyway, good or bad. [Why? ] Why? I’ll tell you why. ‘Cause, you see, doesn’ nobody really know that it’s a God, y’know, ‘cause I mean I have seen black gods, white gods, all color gods, and don’t nobody know it’s really a God. An’ when they be sayin’ if you good, you goin’ t’heaven, tha’s bullsh*t, ‘cause you ain’t goin’ to no heaven, ‘cause it ain’t no heaven for you to go to. †¢ Place holders: â€Å"There† vs. â€Å"It† in the copula †¢ Copula: â€Å"Is†, â€Å"Was† optional †¢ Negatives: â€Å"You ain’t goin’ to no heaven†. BEV just as linguistically complex as Standard American English We don’t see/understand the complexity in other languages Moral: All languages seem to permit as wide range of expressions as others Linguistic Universals What is in common with all languages? Sentences are built from words based on the same physiological processes †¢ All languages have words †¢ All humans have ways of making sounds. †¢ Languages tend to use a small set of phonemic sounds †¢ Phoneme: The minimal unit of sound that contributes to meaning How many phonemes in a language? †¢ English: 40 phonemes †¢ Range: Polynesian 11 to Khoisan 141. Discreteness Messages in human language (e. g. speech sounds) are made up of units of which there is a discrete (limited) number Arbitrariness The relationship between meaningful elements in language and their denotation is independent of any physical resemblance between the two. Words do not have to look or sound like what they describe Openness †¢ New linguistic messages are created freely and easily †¢ Languages are not constrained in a way so that there are a limited number of messages that can be created. †¢ Linguistic Productivity: The ability to understand and create an unlimited number of sentences. The question studied by psycholinguists is â€Å"how to characterize and account for the creativity to construct and create an infinite number of sentences given the limited capabilities of the human brain† Duality of Patterning Language involves relating two different kinds of patterns or forms of representation †¢ A phonological system †¢ A semantic system These two systems use very different types of codes, although there is a phonological representation for each item in the semantic system Phrase structure Information on how a sentence is grouped into phrases. The quiet boy ate the red apple A set of Phrase Structure rules: PS 1 S (sentence) ————-> NP + VP PS 2 NP (noun phrase)————-> det + (adj) + N PS 3 VP (verb phrase) ————-> V +NP PS 4 N (noun) ————-> boy, dog, man, book PS 5 V (verb) ————-> ate, broke, kissed PS 6 adj (adjective ————-> quiet, red, happy, wormy PS 7 det (determiner) ————-> a, the We use â€Å"lexical-insertion rules† to put words into the structure. Phrase-structure rules provide a good account of phrase-structure ambiguity. They are broiling hens Morphology Morphology is the component of grammar that builds words out of units of meaning (morphemes) A morpheme is the smallest meaningful unit of language How many morphemes? bird firetruck undereducated unmicrowaveability Insights from American Sign Language (ASL) Unlike speech, signs are expressed in visual or spatial form Do a lot of the same grammatical concepts hold? Arbitrariness ASL possesses iconicity signs can represent objects or actions to which they refer. However, the degree of iconicity has declined over the years Duality of Patterning signs are composed of smaller elements that are meaningless Example: 3 parameters †¢ 19 values of hand configuration. †¢ 12 values of place of articulation †¢ 24 values of movements Meaningless patterns can be combined in various ways to from ASL signs. What about â€Å"openness† and â€Å"discreteness† within ASL? Transformational Grammar (Chomsky 1950s) Language: an infinite set of well-formed sentences Grammar: A finite set of rules that generates sentences in the language How do we know that a grammar is a good theory of language? Three criteria: Observational Adequacy: A grammar is observationally adequate if it generates all acceptable sequences and no unacceptable sequences. Descriptive adequacy: A grammar must also explain how a sentence relates to other sentences that are similar & opposite in meaning. The ball was caught by John John caught the ball The ball was not caught by John Explanatory adequacy It is possible for multiple grammars to attain observational and descriptive adequacy. Which is the correct/best one? Children learning language are presented with many samples of language and must determine the grammar from these samples. There must be some innate language constraints that help children determine the correct grammar. There exist Linguistic Universals that are common to all languages. The fact that there are similarities in languages is based on the fact that languages are determined by the nature of the mental structures and processes which characterize human beings A Grammar must explain the role of linguistic universals in language acquisition Deep and Surface structure Deep structure: The structure of the sentence that conveys the meaning of the sentence. Surface Structure: The superficial arrangement of constituents Deep structure ambiguity: A single surface structure that is based on two different deep structures Flying planes can be dangerous. Phrase structure rules would not be able to account for the differences in meaning Sentences can have similar phrase structure, although their underlying structure is different: John is easy to please John is eager to please Sentences can different surface structure, but similar deep structure Arlene played the tuba The tuba was played by Arlene Transformational Grammar A two part process to derive a sentence 1) Use Phrase-structure rules to generate the underlying tree structure (deep structure) 2) Apply a sequence of transformational rules to the deep  structure to generate the surface structure of the sentence Transformations occur by adding, deleting or moving constituents John phoned up the woman John phoned the woman up Phrase structure approach: Two different rules VP –> V + (particle) + NP VP –> V + NP + (particle) Each sentence is derived separately, using different phrase structure rules. Transformational grammar approach: One rule V + particle + NP –> V + NP + particle John phoned up the interesting woman John phoned the interesting woman up John phoned up the woman with the curly hair John phoned the woman with the curly hair up. Restrictions on transformations The particle-movement transformation can not be applied to pronouns John called them up *John called up them Example 2: Passive transformation NP1 + V + NP2 –> NP2 + be + V + en + by + NP1 Arlene played the tuba The tuba was played by Arlene Psychological Reality of Transformational Grammar If using language is a process of converting the deep structure to the surface structure, then the number of transformation rules applied should affect how long it takes to process a sentence. However, experiments do not consistently show that this holds true Current theories of grammar Lexical-Function Grammar  Made up of three components: a constituent structure, a functional structure, and lexical entries Constituent Structure: Similar to phrase structure Functional Structure: All the information needed for semantic interpretation John told Mary to leave Bill Predicate tell (subj, obj, V-comp) Tense Past Subj John Obj Mary V-comp predicate leave subj Mary obj Bill Lexical Entries Lexical entries contain information about: †¢ the forms of the word †¢ the kinds of sentences into which they fit, †¢ arguments and semantic roles Mary kissed John John was kissed by Mary Entry for â€Å"kiss† includes underlying semantic structure  kiss: (agent, patient). Forms of the word kiss: agent = subject: patient = object (be) kiss: agent=object: patient = subject Major significance of LFG Most of the explanation of how we process language is based on the lexicon (where we store information about words) . Government-Binding Theory or Universal Grammar Chomsky’s view of innate grammatical mechanisms. In GB theory, grammar is modular. Grammar due to interaction of several independent subsystems, or modules. Each module is fairly simple and performs part of the task But all modules interact in order to constrain the rules made by the other modules in the grammar. Implications We all inherit a universal grammar that can be set to different parameter values. These parameter values correspond to different languages. As we get experience with a language, we acquire these parameter values, and thus the language upon which it is based. Research methods in Psycholinguistics How do we observe, collect information on phenomena related to psycholinguistics? Naturalistic Observation Observing information in a non-experimental setting Slips of the tongue Phonological switching: Crushing blow –> Blushing crow semantic replacements: blond eyes for blond hair. Language Acquisition The use of language over time Data from naturalistic observation Rich, but hard to analyze Controlled experiments Goal: test an empirical hypothesis Hypothesis: A chapter will be easier to understand if each section starts with a summary of what will be said. Independent Variable: Variable that is manipulated to test the hypothesis. Dependent Variable: Variable representing the behavior we want to measure Control Variables: Other variables we need to control in order to see the effect of the independent variable Subjects: Who is going to participate in the experiment? Analysis: How do we know if there are differences bewteen the two chapters? The Human Information Processing System What psychological mechanisms are involved in using language? The Sensory store Processes incoming information from the environment †¢ Individual sensory stores for each sense †¢ Information retained for a short duration The visual sensory store Experiments by Sperling (1960) X M R K C N J P V F L B The partial report technique Auditory sensory store Experiment by Darwin, Turvey & Crowder (1972) 3 digits or letters auditorally presented to each ear and center at the same time. What is the use of the sensory store? It maintains information long enough so that we can do additional processing to it. Working memory or short term memory (STM) STM used to describe the fact that it holds information for a short time, while working memory refers to the processing capacity. STM works as a temporary holding place for intermediate decisions. Limited in size. Chunking Working memory: there is a limited amount of processing capacity that you can use as you perform a problem Long term memory Knowledge of how to do things, things we have learned, grammar rules, personal memories. All knowledge that is not active. Information that becomes active is retrieved from LTM and put in STM. Anything we learn is first processed in STM and some of it is put into LTM Episodic vs. Semantic Memory distinction Semantic memory †¢ Organized knowledge of words, concepts, symbols and objects. motor skills, general knowledge, spatial knowledge , social skills. †¢ All information is organized semantically, but not tagged based on when it was learned. Episodic memory †¢ Holds traces of events specific time and place. †¢ Memory of personal experiences. Interaction between semantic and episodic memory. What does the organization of the information processing system have to do with language processing? Pattern Recognition Parsing/understanding sentences in working memory This is a long sentence and yet somehow you can keep it all in working memory The organization of Long Term Memory That cat plays really cool jazz Serial vs. Parallel Processing Serial processing: One process working at a time Parallel Processing: Multiple processes working at a time In a serial model of language processing, individual modules would work one at a time to process the information. A parallel model would say that the processes happen at the same time. Parallel models as neurally inspired models of cognitive processes Top-Down vs. Bottom-Up processing Cognitive processing occurs at levels Bottom-up processing is done in such a way that all processing occurs starting from the lowest level processes and proceeds onto the higher level processes Higher level processes do not influence any of the processing done at the lower levels Top down processing: Information at the higher levels influences processing at the lower levels. Advantages and disadvantages of Top-Down processing Automatic vs. Controlled processes We have a limited amount of processes that we can do at a time. Controlled processing: Processes that require a substantial amount of cognitive processing. Automatic processing: Processes that do not require a substantial amount of cognitive processing. The role of practice in automatic processing The Stroop effect Putting it all together: Cognitive processes in action The novice accepted the deal before he had a chance to check his finances, which put him in a state of conflict when he realized he had a straight flush. The Internal Lexicon How are words stored? What are they made up of? How are word related to each other? How do we use them? Internal lexicon The representation of words in long term memory Lexical Access: How do we activate the meanings of words? Aspects of Meaning Reference: The relationship between words and things in the world Things in the world are referents of a word My dog has fleas My dog is from Mars But not all reference can be mapped to concrete things Abstract words: Love, Justice, Equality Non existent objects: Unicorn, Martians Meaning is not restricted to the real world, but also imaginary worlds Sense: The relationship of a word with other words in the language Student at NMSU vs. Undergraduate at NMSU Synonymy (same meaning) Car Automobile Antonymy (opposite meaning) Happy Sad Incompatibility (do the words contradict each other? ) John is happy vs. John is sad Hyponymy (are they part of the same class? ) A dog is an animal, Bowser is a dog, Denotation vs. Connotation Denotation: The objective meaning of the word Connotation: The aspect of the meaning beyond its explicit meaning Bachelor Spinster Hungry Starving The Mental Representation of Meaning The representation of the meaning of a word is based on the semantic features of that word. We acquire the meaning of a word by learning its semantic features Children make semantic mistakes Verbs of possession. We understand more than the meaning, we have knowledge of the relations between these words sold vs. paid give vs. receive lose vs. find Prototypes: Some members of a category are better instances of the category than others Apple vs. pomegranate What makes a prototype? More central semantic features What type of dog is a prototypical dog What are the features of it? We are faster at retrieving prototypes of a category than other members of the category Semantic Networks. Words can be represented as an interconnected network of sense relations †¢ Each word is a particular node †¢ Connections among nodes represent semantic relationships Mental models: A model/understanding of how the world works and how pieces of textual information fits in with it. John is sitting in a chair. That chair is on a table. The table is blue and round. John has red hair. The structure of the Internal Lexicon How do these pieces of semantic information relate to each other? Semantic verification task An A is a B An apple is a fruit A robin is a bird A robin is an animal A dog has teeth  A fish has gills A fish has feathers An apple has teeth NMSU is in New Mexico Harvard is in California Use time on verification tasks to map out the structure of the lexicon. Models of the Lexicon Collins and Quillian Hierarchical Network model Lexical entries stored in a hierarchy, with features attached to the lexical entries Representation permits cognitive economy Testing the model Sentence Verification time Robins eat worms 1310 msecs Robins have feathers 1380 msecs Robins have skin 1470 msecs A category size effect: Subjects do an intersection search Problems with Collins and Quillian model . 1) Effect may be due to frequency of association 2) Assumption that all lexical entries at the same level are equal The Typicality Effect Which is a more typical bird? Ostrich or Robin. A whale is a fish vs. A horse is a fish Major conclusions of the model: 1) If a fact about a concept is frequently encountered, it will be stored with that concept even if it could be inferred from a more distant concept. 2) The more frequently encountered a fact about a concept is, the more strongly that fact will be associated with the concept. And the more strongly associated with a concept facts are, the more rapidly they are verified. 3) Verifying facts that are not directly stored with a concept but that must be inferred takes a relatively long time. Spreading Activation Models (Collins & Loftus) †¢ Words represented in lexicon as a network of relationships †¢ Organization is a web of interconnected nodes in which connections can represent: categorical relations degree of association typicality Retrieval of information †¢ Spreading activation †¢ Limited amount of activation to spread †¢ Verification times depend on closeness of two concepts in a network Context effect in spreading activation models Present either: Murder is a crime or Libel is a crime Then get verification time for Robbery is a crime Subjects faster when they see Murder than Libel. Why? Advantages of Collins and Loftus model †¢ Recognizes diversity of information in a semantic network †¢ Captures complexity of our semantic representation †¢ Consistent with results from priming studies Lexical Access What factors are involved in retrieving information from the lexicon? Semantic Priming Meyer & Schvaneveldt (1971) Lexical Decision Task Prime Target Time Nurse Butter 940 msecs Bread Butter 855 msecs Evidence for associative spreading activation. Ratcliff and McKoon (1981) Subjects study and memorize The doctor hated the book Task: â€Å"Was this word from the sentence you memorized? † Prime Target Time None Book 667 msecs Doctor Book 624 msecs Word Frequency Does word frequency play a role in lexical access? Lexical Decision Task: gambastya, revery, voitle, chard, wefe, cratily, decoy, puldow, raflot, oriole, vuluble, booble, chalt, awry, signet, trave, crock, cryptic, ewe, himpola mulvow, governor, bless, tuglety, gare, relief, ruftily, history, pindle, develop, gardot, norve, busy, effort, garvola, match,sard, pleasant, coin, maisle. Lexical Decision is dependent on word frequency Eyemovement studies: Subjects spend about 80 msecs longer fixating on low-frequency words than high-frequency words Morphological Structure So we strip off the prefixes and suffixes of a word for lexical access? Decision = Decide + ion Lexical Decision Tasks: Prime Target Time Nurse Butter 940 msecs Bread Butter 855 msecs Evidence for associative spreading activation Ratcliff and McKoon (1981) Subjects study and memorize The doctor hated the book Task: â€Å"Was this word from the sentence you memorized? † Prime Target Time None Book 667 msecs Doctor Book 624 msecs Word Frequency Does word frequency play a role in lexical access? Lexical Decision Task: gambastya, revery, voitle, chard, wefe, cratily, decoy, puldow, raflot, oriole, vuluble, booble, chalt, awry, signet, trave, crock, cryptic, ewe, himpola mulvow, governor, bless, tuglety, gare, relief, ruftily, history, pindle, develop, gardot, norve, busy, effort, garvola, match,sard, pleasant, coin, maisle. Lexical Decision is dependent on word frequency Eyemovement studies: Subjects spend about 80 msecs longer fixating on low-frequency words than high-frequency words Morphological Structure So we strip off the prefixes and suffixes of a word for lexical access? Decision = Decide + ion Lexical Decision Tasks: Presented subjects with a sequence of words to study Examined the probability of recognizing words over 14 days Performance systematically decays over time Negatively accelerated decay. Bahrick (1984) Student’s retention of spanish-english vocabulary items from 0 to 50 years Power law of decay Review on the internal lexicon Aspects of meaning: Reference and Sense Denotation and Connotation What is the mental representation of meaning? Models of the Lexicon Hierarchical Network Model Spreading Activation Model What factors are involved in retrieving information from the lexicon? Semantic Priming Word Frequency Morphological Structure Lexical Ambiguity Retention of lexical items.

Free Essays on Living Together

Should We Live Together? A careful review of the available social science evidence suggests that living together is not a good way to prepare for marriage or to avoid divorce. What's more, it shows that the rise in cohabitation is not a positive family trend. Cohabiting unions tend to weaken the institution of marriage and pose clear and present dangers for women and children. Living together before marriage is one of America's most significant and unexpected family trends. By simple definition, living together or unmarried cohabitation is the status of couples who are sexual partners, not married to each other, and sharing a household. By 1997, the total number of unmarried couples in America topped 4 million, up from less than half a million in 1960. It is estimated that about a quarter of unmarried women between the ages of 25 and 39 are currently living with a partner and about half have lived at some time with an unmarried partner (the data are typically reported for women but not for men). Over half of all first marriages are now preceded by cohabitation, compared to virtually none earlier in the century. Unlike divorce or unwed childbearing, the trend toward cohabitation has inspired virtually no public comment or criticism. It is hard to believe that across America, only thirty years ago, living together for unmarried, heterosexual couples was against the law. And it was considered immoral living in sin or at the very least highly improper. Women who provided sexual and housekeeping services to a man without the benefits of marriage were regarded as fools at best and morally loose at worst. A double standard existed, but cohabiting men were certainly not regarded with approbation. Today, the old view of cohabitation seems yet another example of the repressive Victorian norms. The new view is that cohabitation represents a more progressive approach to intimate relationships. How much healthier women are... Free Essays on Living Together Free Essays on Living Together Should We Live Together? A careful review of the available social science evidence suggests that living together is not a good way to prepare for marriage or to avoid divorce. What's more, it shows that the rise in cohabitation is not a positive family trend. Cohabiting unions tend to weaken the institution of marriage and pose clear and present dangers for women and children. Living together before marriage is one of America's most significant and unexpected family trends. By simple definition, living together or unmarried cohabitation is the status of couples who are sexual partners, not married to each other, and sharing a household. By 1997, the total number of unmarried couples in America topped 4 million, up from less than half a million in 1960. It is estimated that about a quarter of unmarried women between the ages of 25 and 39 are currently living with a partner and about half have lived at some time with an unmarried partner (the data are typically reported for women but not for men). Over half of all first marriages are now preceded by cohabitation, compared to virtually none earlier in the century. Unlike divorce or unwed childbearing, the trend toward cohabitation has inspired virtually no public comment or criticism. It is hard to believe that across America, only thirty years ago, living together for unmarried, heterosexual couples was against the law. And it was considered immoral living in sin or at the very least highly improper. Women who provided sexual and housekeeping services to a man without the benefits of marriage were regarded as fools at best and morally loose at worst. A double standard existed, but cohabiting men were certainly not regarded with approbation. Today, the old view of cohabitation seems yet another example of the repressive Victorian norms. The new view is that cohabitation represents a more progressive approach to intimate relationships. How much healthier women are...