BIOLOGICAL BASES OF BEHAVIOR
BIOLOGY OF CONSCIOUSNESS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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less than that between children and their biological parents.
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equal to that between identical twins reared together.
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equal to that between fraternal twins reared together.
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greater than that between ordinary siblings reared together.
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equal to that between adopted siblings reared together.
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Detailed explanation-1: -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-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: -Early twin studies of adult individuals have found a heritability of IQ between 57% and 73%, with some recent studies showing heritability for IQ as high as 80%. IQ goes from being weakly correlated with genetics for children, to being strongly correlated with genetics for late teens and adults.
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).
Detailed explanation-5: -The IQ correlation for identical twins raised apart is much lower than for fraternal twins raised together. children adopted in the early years attain IQs that, on average, match the scores of their adoptive parents’ biological children and the scores of nonadopted peers in their schools and communities.