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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percentage of a person’s intelligence that is due to environmental influences
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percentage of a person’s intelligence that is due to behavior
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correlation of intelligence test scores among family members
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extent to which variability among individuals’ intelligence scores can be attributed to genes
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genetic stability of intelligence over time
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Detailed explanation-1: -The correct answer is D. (extent to which variability among individuals’ intelligence scores can be attributed to genetic variation). Explanation: Heritability generally refers to how much our differences in certain abilities are caused by differences in our genetic makeup.
Detailed explanation-2: -Intelligence is highly heritable and predicts important educational, occupational and health outcomes better than any other trait. Recent genome-wide association studies have successfully identified inherited genome sequence differences that account for 20% of the 50% heritability of intelligence.
Detailed explanation-3: -The correct answer is C. (the amount of group variation in intelligence that can be attributed to genetics.). Explanation: Heritability or genetic influence on intelligence variation among group members is estimated to be approximately 50 to 80 percent.
Detailed explanation-4: -Heritability of intelligence refers to: the amount of group variation in intelligence that can be attributed to genetics.
Detailed explanation-5: -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.