Tuesday, April 27, 2010

How Babies Learn Language

During the first year of a child's life, parents and care takers are concerned with its physical development; during the second year they watch the baby's language development very carefully. It is interesting just how easily children learn language. Children who are just three or four years old, who cannot yet tie their shoelaces, are able to speak in full sentences without any specific language training.

The current view of child language development is that it is an instinct—something as natural as eating or sleeping. According to experts in this area, this language instinct is innate—something each of us is born with. But this prevailing view has not always enjoyed widespread acceptance.

In the middle of last century, experts of the time, including a renowned professor at Harvard University in the United States, regarded child language development as the process of learning through mere repetition. Language "habits" developed as young children were rewarded for repeating language correctly and ignored or punished when they used incorrect forms of language. Over time, a child, according to this theory, would learn language much like a dog might learn to behave properly through training.

Yet even though the modern view holds that language is instinctive, experts like Assistant Professor Lise Eliot are convinced that the interaction a child has with its’ parents and care givers is crucial to its development. The language of the parents and caregivers acts as models for the developing child. In fact, a baby's day-to-day experience is so important that the child will learn to speak in a manner very similar to the model speakers it hears.

Given that the models parents provide are so important, it is interesting to consider the role of "baby talk" in the child's language development. Baby talk is the language produced by an adult speaker who is trying to exaggerate certain aspects of the language to capture the attention of a young baby.

Dr. Roberta Golinkoff believes that babies benefit from baby talk.

Experiments show that immediately after birth babies respond more to infant-directed talk than they do to adult-directed talk. When using baby talk, people exaggerate their facial expressions, which help the baby to begin to understand what is being communicated. She also notes that the exaggerated nature and repetition of baby talk helps infants to learn the difference between sounds. Since babies have a great deal of information to process, baby talk helps.

Although there is concern that baby talk may persist too long, Dr. Golinkoff says that it stops being used as the child gets older, that is, when the child is better able to communicate with the parents.

Professor Jusczyk has made a particular study of babies' ability to recognize sounds, and says they recognize the sound of their own names as early as four and a half months. Babies know the meaning of Mummy and Daddy by about six months, which is earlier than was previously believed. By about nine months, babies begin recognizing frequent patterns in language. A baby will listen longer to the sounds that occur frequently, so it is good to frequently call the infant by its name.

An experiment at Johns Hopkins University in USA, in which researchers went to the homes of 16 nine-month-olds, confirms this view. The researchers arranged their visits for ten days out of a two week period. During each visit the researcher played an audio tape that included the same three stories. The stories included odd words such as "python" or "hornbill", words that were unlikely to be encountered in the babies' everyday experience. After a couple of weeks during which nothing was done, the babies were brought to the research lab, where they listened to two recorded lists of words. The first list included words heard in the story. The second included similar words, but not the exact ones that were used in the stories.

Jusczyk found the babies listened longer to the words that had appeared in the stories, which indicated that the babies had extracted individual words from the story. When a control group of 16 nine-month-olds, who had not heard the stories, listened to the two groups of words, they showed no preference for either list.

This does not mean that the babies actually understand the meanings of the words, just the sound patterns. It supports the idea that people are born to speak, and have the capacity to learn language from the day they are born. This ability is enhanced if they are involved in conversation. And, significantly, Dr Eliot reminds parents that babies and toddlers need to feel they are communicating. Clearly, sitting in front of the television is not enough; the baby must be having an interaction with another speaker.

Monday, May 18, 2009

Forex scam

A forex (or foreign exchange) scam is any trading scheme used to defraud individual traders by convincing them that they can expect to gain a high profit by trading in the foreign exchange market. Currency trading "has become the fraud du jour" as of early 2008, according to Michael Dunn of the U.S. Commodity Futures Trading Commission. [1] But "the market has long been plagued by swindlers preying on the gullible," according to the New York Times [2]. "The average individual foreign-exchange-trading victim loses about $15,000, according to CFTC records" according to The Wall Street Journal. [3] The North American Securities Administrators Association says that "off-exchange forex trading by retail investors is at best extremely risky, and at worst, outright fraud." [4]

“In a typical case, investors may be promised tens of thousands of dollars in profits in just a few weeks or months, with an initial investment of only $5,000. Often, the investor’s money is never actually placed in the market through a legitimate dealer, but simply diverted – stolen – for the personal benefit of the con artists.”[5]

In August, 2008 the CFTC set up a special task force to deal with growing foreign exchange fraud.”[6]

The forex market is a zero-sum game[7] , meaning that whatever one trader gains, another loses, except that brokerage commissions and other transaction costs are subtracted from the results of all traders, technically making forex a "negative-sum" game.

These scams might include churning of customer accounts for the purpose of generating commissions, selling software that is supposed to guide the customer to large profits, [8] improperly managed "managed accounts", [9] false advertising, [10] Ponzi schemes and outright fraud. [4] [11] It also refers to any retail forex broker who indicates that trading foreign exchange is a low risk, high profit investment. [12]

The U.S. Commodity Futures Trading Commission (CFTC), which loosely regulates the foreign exchange market in the United States, has noted an increase in the amount of unscrupulous activity in the non-bank foreign exchange industry.[13]

An official of the National Futures Association was quoted [14] as saying, "Retail forex trading has increased dramatically over the past few years. Unfortunately, the amount of forex fraud has also increased dramatically..." Between 2001 and 2006 the U.S. Commodity Futures Trading Commission has prosecuted more than 80 cases involving the defrauding of more than 23,000 customers who lost $350 million. From 2001 to 2007, about 26,000 people lost $460 million in forex frauds. [1] CNN quoted Godfried De Vidts, President of the Financial Markets Association, a European body, as saying, "Banks have a duty to protect their customers and they should make sure customers understand what they are doing. Now if people go online, on non-bank portals, how is this control being done?"

From Wikipedia, the free encyclopedia