TESTING AND INDIVIDUAL DIFFERENCES
STUDYING GENETIC AND ENVIRONMENTAL INFLUENCES ON INTELLIGENCE
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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30% in childhood and 40% in adulthood
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20% in childhood and 50% in adulthood
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40% in childhood and 50% in adulthood
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30% in childhood and 50% in adulthood
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Detailed explanation-1: -However, for intelligence, heritability increases linearly, from (approximately) 20% in infancy to 40% in adolescence, and to 60% in adulthood.
Detailed explanation-2: -Furthermore, the heritability of cognition is moderated by age, with the heritability of IQ increasing from around 40% in early childhood to over 80% in adulthood [23].
Detailed explanation-3: -A disease with a 50% heritability does not mean that 50% of the reason an individual develops that disease is determined by that person’s genetics, while the other 50% is determined by their environment. It simply reflects how much variation between people with that disease is due to underlying genetic factors.
Detailed explanation-4: -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-5: -The heritability of g has been estimated to fall between 40 and 80 percent using twin, adoption, and other family study designs as well as molecular genetic methods.