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Did your engineering program require any courses in psychology or biology? You really should defer to molliebatmit when talking about malleability of human intelligence, which appears to be a topic you haven't read much about.</p>
<p>All IQ test items are samples of learned behavior.</p>
<p>Professor Alan S. Kaufman, a designer of one edition of the Wechsler Intelligence Scale for Children and of the Kaufman Assessment Battery for Children, writes frequently about the issue of “intelligent testing,” understanding what IQ tests are and how to interpret them correctly. As he lists issues to keep in mind when interpreting IQ test scores, he says that the scores are based on “what the individual has learned,” and are “samples of behavior and are not exhaustive” (Kaufman 1994, pp. 6-7). IQ test scores reflect the learning opportunities available to the test-taker and the cultural context in which the test-taker grew up. The many aspects of human behavior that are not sampled by an IQ test may not be well predicted by the test score, which therefore should not be taken as a global estimate of the test-taker’s intellectual functioning (Kaufman 1994, p. 7).</p>
<p>IQ scores change for individuals over the course of life.</p>
<p>IQ scores are sufficiently stable from one time of taking an IQ test to the next that most psychologists conclude that what is estimated by an IQ test can be regarded as a “trait” rather than a “state” of an individual test-taker. And yet IQ scores, especially in childhood, do vary over the course of a test-taker’s life, sometimes varying radically. Deviation IQ scoring was originally developed to make for more stability of scores over the course of childhood. Nonetheless, deviation IQs for children can also change considerably over the course of childhood (Pinneau 1961; Truch 1993, page 78; Howe 1998; Deary 2000, table 1.3). “Correlation studies of test scores provide actuarial data, applicable to group predictions. . . . Studies of individuals, on the other hand, may reveal large upward or downward shifts in test scores.” (Anastasi & Urbina 1997 p. 326).</p>
<p>For example, young people in the famous Lewis Terman longitudinal Genetic Studies of Genius (initial n=1,444 with n=643 in main study group) when tested at high school age (n=503) were found to have dropped 9 IQ points on average in Stanford-Binet IQ. More than two dozen children dropped by 15 IQ points and six by 25 points or more. Parents of those children reported no changes in their children or even that their children were getting brighter (Shurkin 1992, pp. 89-90). Terman observed a similar drop in IQ scores in his study group upon adult IQ testing (Shurkin 1992, pp. 147-150). Samuel R. Pinneau conducted a thorough review of the Berkeley Growth Study (1928-1946; initial n=61, n after eighteen years =40). Alice Moriarty was a Ph.D. researcher at the Menninger Foundation and describes in her book (1966) a number of case studies of longitudinal observations of children's IQ. She observed several subjects whose childhood IQ varied markedly over the course of childhood, and develops hypotheses about why those IQ changes occurred. Anastasi and Urbina (1997, p. 328) point out that childhood IQ scores are poorest at predicting subsequent IQ scores when taken at preschool age. Change in scores over the course of childhood shows that there are powerful environmental effects on IQ (Anastasi & Urbina 1997, p. 327) or perhaps that IQ scores in childhood are not reliable estimates of a child’s scholastic ability.</p>
<p>Anastasi, Anne & Urbina, Susana (1997). Psychological Testing. Upper Saddle River, NJ: Prentice Hall.</p>
<p>Deary, Ian J. (2000) Looking Down on Human Intelligence: From Psychometrics to the Brain. Oxford: Oxford University Press.</p>
<p>Howe, Michael J. A. (1998). Can IQ Change?. The Psychologist, February 1998 pages 69-72.</p>
<p>Kaufman, Alan S. (1994). Intelligent Testing with the WISC-III. New York: Wiley.</p>
<p>Moriarty, Alice E. (1966). Constancy and IQ Change: A Clinical View of Relationships between Tested IQ and Personality. Springfield, IL: Charles C. Thomas.</p>
<p>Pinneau, Samuel R. (1961). Changes in Intelligence Quotient Infancy to Maturity: New Insights from the Berkeley Growth Study with Implications for the Stanford-Binet Scales and Applications to Professional Practice. Boston: Houghton Mifflin.</p>
<p>Shurkin, Joel N. (1992). Terman's Kids: The Groundbreaking Study of How the Gifted Grow Up. Boston: Little, Brown.</p>
<p>Truch, Steve (1993). The WISC-III(R) Companion: A Guide to Interpretation and Educational Intervention. Austin, TX: Pro-Ed.
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None of this is new to me, I fail to see your point. IQ is a proxy for "intelligence". It is not intelligence (we do not have any way to measure this). The correlations are not debatable though, IQ correlates well with academic performance.</p>