What is Bronfenbrenner's term for the changes that occur in developmental circumstances over time, both with respect to individual development and to historical changes?

Egbert is an inactive, withdrawn child who reacts very cautiously and deliberately to the world around him. Thomas and Chess would say his temperament is ________

a. difficult b. laid back c. easy d. slow to warm up

Rational-emotive behavior therapy was proposed by

a) Freud b) Skinner c) Piaget d) Ellis