GROWTH DEVELOPMENT CHILD
MEASUREMENT OF INTELLIGENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Their intelligence test scores are closely matched.
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Their brain matter volume and activation are different.
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Their environment has no influence on their intelligence.
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They have the same intelligence correlations as adopted siblings would.
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Detailed explanation-1: -Fred and Eric are identical twins. Which is likely true about their intelligence? Their intelligence test scores are closely matched. Nadine believes that girls can’t run as fast boys.
Detailed explanation-2: -The correlation of intelligence test scores for identical twins raised together is about +. 85. For identical twins raised apart, the correlation is about +. 72.
Detailed explanation-3: -Which of the following is true about differences in intelligence between identical twins? Whether raised together or apart, identical twins score much more similarly on IQ tests than any other pairs of siblings.
Detailed explanation-4: -Knowing the intelligence score of one fraternal twin raised together with their sibling allows predicting the other twin’s score with an accuracy of 55%. For identical twins reared together the percentage goes up to 86%, while for identical twins reared apart the percentage drops slightly, to 76%.
Detailed explanation-5: -In this investigation, researchers found that identical twins raised together and identical twins raised apart exhibit a higher correlation between their IQ scores than siblings or fraternal twins raised together (Bouchard, Lykken, McGue, Segal, & Tellegen, 1990).