The primary concern of developmental scientists is to explore the processes of development ("how"), rather than the reasons behind these processes ("why")

Adler's birth order had its roots in

A) his lifelong competitive relationship with his older brother. B) association with Darwinism. C) being born with a disease. D) his strong jealousy of his pampered sister.

To explain depression, trait theorists would most likely focus on

A. identifying people prone to depression. B. the genetic susceptibility individuals have toward depression. C. the unconscious feelings of anger within people. D. how people interpret a world that seems uncontrollable.