Describe the Ways in Which Humanist Psychologists Argue They Have

Researchers measure genetic contributions to personality in three ways: by studying personality traits in other species, by studying the temperaments of human infants and children, and by doing heritability studies of twins and adopted individuals. Briefly summarize the evidence from each type of study that personality is, at least in part, biologically determined.

Three crucial aspects of the environment are parents, peers, and particular situations. How much, and in what ways, do each of these aspects contribute to personality?