CHILD DEVELOPMENT PEDAGOGY

Detailed explanation-1: -Twin and adoption studies are helpful for assessing the proportion of variation among individuals in intelligence scores that can be attributed to genetics; that is, such studies are helpful for assessing the of intelligence.

Detailed explanation-2: -Twin and adoption studies can be used to separate the effects of genetics from the social environment of rearing, and twin studies can often give clues to the importance of biological environmental factors.

Detailed explanation-3: -Twin studies allow disentanglement of the shared genetic and environmental factors for the trait of interest. Researchers can estimate the proportion of variance in a trait attributable to genetic variation versus the proportion that is due to shared environment or unshared environment.

Detailed explanation-4: -Twin studies compare the rates that a given behavioral trait is shared among identical and fraternal twins; adoption studies compare those rates among biologically related relatives and adopted relatives.

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.