CHILD DEVELOPMENT PEDAGOGY

Detailed explanation-1: -The correlation of intelligence test scores for identical twins raised together is about +. 85. For fraternal twins raised together, it is about +. 60.

Detailed explanation-2: -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-3: -The studies of reared-apart twins have shown that in general, half the differences in personality and religiosity are genetically determined, but for a trait like I.Q., about 75 percent of the variation, on average, is genetic, with only 25 percent influenced by the environment.

Detailed explanation-4: -Twin studies used to be almost the only way to compare the influence of genes against the environment on personality and behavior. Recent advances in genetics, however, suggest that opposing “nature” to “nurture” is misleading. Genes combine with the environment to produce complex human traits. Harold T.

Detailed explanation-5: -Identical twins tend to share all of the genes and non-identical twins share half of their genes. Therefore, it makes it easy to understand that any differences in traits or ability evident among identical twins, might be a result of nurture or environmental factors rather than genetics factors.