AP PSYCHOLOGY

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.