According to the results of one study, the correlation between estimatesof European ancestry and various measures of IQ among African-Americans wasA. virtually zeroB. around 0.50C. around -0.75D. near a perfect 1.00

According to research conducted by sociologist Thomas Sowell, racial differences in IQ scores result not from __________ but rather from __________.A.heredity; geneticsB.culture; heredityC.biology; a cultural environmentD.environment; instinctSubmit

While research suggests a positive correlation between IQ and academic achievement (Murray, 2008), factors like motivation, study skills, and socioeconomic background also play a significant role.

Some research suggests that first born children may have higher IQ scores than their later born siblings. Do first-born identical twins have higher IQ scores than their second-born sibling? Data from a 1998 study were analyzed to determine whether first-born identical twins have higher IQ scores than their second-born siblings. Ten pairs of adult identical twins were assessed and their Full Scale IQ scores were calculated.Source: M. J. Tramo, W. C. Lodtus, T. A. Stukel, R. L. Green, J. B. Weaver, and M. S. Gazzaniga. “Brain Size, Head Size, and Intelligence Quotient in Monozygotic Twins.” Neurology 50, 1246–52.The following hypotheses were tested:H0: μd = 0Ha: μd < 0The following is the (edited) output for the test:SampleNMeanStDevSE MeanFirst-born10112.914.74.65Second-born10108.711.33.57Difference104.113.44.2395% lower bound for mean difference: −4.36t-test of mean difference = 0 (vs. > 0): t-value = 0.97, p-value = 0.179Which of the following is an appropriate conclusion based on the output? The data provide sufficient evidence to reject H0and, thus, conclude that the mean Full Scale IQ score for first-born identical twins is higher than the mean Full Scale IQ score for second-born identical twins. The data do not provide sufficient evidence to reject H0. We therefore conclude that the mean Full Scale IQ score for first-born identical twins is higher than the mean Full Scale IQ score for second-born identical twins. The data provide sufficient evidence to reject H0. We therefore conclude the data do not provide evidence to conclude that the mean Full Scale IQ scores for first-born identical twins is higher than that of second-born identical twins. The data do not provide sufficient evidence to reject H0. In other words, based on the data we cannot conclude that the mean Full Scale IQ scores for first-born identical twins is higher than the mean Full Scale IQ score for second-born identical twins.

Intelligence has always been tricky to quantify, not least because it seems to involve most of the brain and so is almost certainly not one "thing". Even so, scores across different kinds of IQ tests have long shown that people who do particularly well—or badly—on one seem to do similarly on all. This can be crunched into a single general intelligence factor, or “g”, which correlates pretty well with academic success, income, health and lifespan. So more intelligence is clearly a good thing, but where does it come from? A large part of the answer seems to be genetics. In 1990, the first twin studies showed that the IQ scores of identical twins raised apart are more similar to each other than those of non-identical twins raised together. Since then a few genes have been linked to IQ, but all of them scent to have a tiny effect and there are probably thousands of genes involved.That doesnt mean the environment plays no part, at least in childhood. While the brain is developing, everything from diet to education and stimulation plays a huge part in developing the brain structures needed for intelligent thought. Children with a bad diet never fulfill their genetic potential.The word "those" in paragraph 2 refers to .............

The observation that each generation has a significantly higher IQ than the last is called:Question 7Select one:a.Generation biasb.IQ biasc.Testing effectsd.Flynn effecte.None of the above