Small areas of secondary motor cortex were discovered in the

A personality inventory that utilizes only those items that have been shown to differentiate particular groups of people is called a(n) ________ test.

Fill in the blank(s) with the appropriate word(s).

________ is a research design in which the contribution of genes and environment is teased apart by comparing individuals who share 100% or 50% of their segregating genes

a. Twin design b. Heritability c. Adoption design d. Epigenesis