nature versus nurture
The dubious history of the heredity environment controversy can be easily traced as far back as the start of the present century with at least some historical evidence placing the roots of this dispute in the time of John Locke. This controversy has continued despite continual reiteration that the critical question is not how much of a trait is due to heredity and how much is due to environment, but rather how environment transact to influence development. This paper will focus on the nature/nurture controversy and the extent to which an individual's intellectual level is determined either by inborn intelligence or by environmental factors. Psychologists and biologists striving to determine how heredity and environment influence the development of intelligence have actively pursed the relative powers of nature and nurture. Before we can go on to discuss the relationships between intelligence and the controversy that exists between the different schools of thought r!egarding inherited or environmental issues we must have an understanding of what intelligence really is. Of all the words used in pressed day psychology, intelligence is one of the most difficult to define and is also one of the most
One famous study shows that the intelligence test scores of identical twins, whether reared together or apart, display considerably higher correlation than the scores of fraternal twins. While environmental factors are important in raising or lowering a child's level of intellectual performance, these studies demonstrate that !they only do so within limits set by heredity. The study also found that black and interracial children reared in the culture of the tests and the school perform as well as other adopted children in similar families. Burk's study indicates that the maximum contribution of the best home environment to intelligence is a!bout 20 points and that the least cultured kind of American home environment may depress the IQ by as much as 20 points. However, this research provides an important foundation for this research. Corsini provides us with a somewhat more simplistic definition of the term intelligence. In general, the results demonstrate that improved environmental conditions that endure can raise the level of intelligence, if optimal conditions are provided early in life. There is however, a general agreement that intelligence refers to the overall faculties of the mind which concern themselves with the sorting of information in the brain after it has been received by the senses, the perceiving of relationships between this new data and information which is already in memory, and the capacity to make rapid and appropriate decisions as a result of the previous processes. Jense, found that orphanage children gained in IQ from an average of 64 at an average age of nineteen months to 96 at six years of age as a result of being given social stimulation and placement in good homes at between two and three years of age. The studies produced evidence linking the quality of stimulation provided in earlyyears of life to cognitive ability in young children. Their studies indicated that home environment scores during the first two years of life were strongly related to fifty-four month IQ scores. The purpose of the review is to provide a comprehensive summary of the literature on the IQ correlation's between relatives. The patterns of averaged correlation's is remarkably consistent with pyloric theory. This is not to discount the importance of environmental factors; monozyotic twins reared apart are far from perfectly correlated, dizygotic twins are more similar than other biological siblings.
Common topics in this essay:
Adoption Project,
John Locke,
IQ RACE,
Japanese Chinese,
According Layer,
TWIN STUDIES,
Harold Shell's,
Raymond Corsini,
Bouchard McGud,
Adoption Study,
adopted children,
iq scores,
environmental factors,
nature nurture,
home environment,
black interracial,
identical twins,
twins reared,
black interracial children,
biological parents,
biological mothers,
twins reared apart,
twins alike iq,
intelligence test scores,
fraternal twins alike,
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Acceptance Essays
