TESTING AND INDIVIDUAL DIFFERENCES
STUDYING GENETIC AND ENVIRONMENTAL INFLUENCES ON INTELLIGENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Adoptive children become much more similar to their adoptive parents
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adoptive children become slightly more similar to their adoptive parents
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Adoptive children become much less different than their adoptive parents
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Adoptive children become slightly less similar to their adoptive parents
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Detailed explanation-1: -adoption data showed that the IQ scores of the adopted children were actually more highly correlated with the occupational status of their biological parents than their adoptive parents, despite the significant environmental effect on the mean (4).
Detailed explanation-2: -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-3: -Cattell’s Theory of Intelligence Raymond Cattell (1963) proposed the notion of fluid and crystallized intelligence. Fluid intelligence is the capacity to reason and solve new problems. Crystallized intelligence is the ability to use skills, knowledge, and past experiences.
Detailed explanation-4: -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).