______________ is an attempt by the ego to keep undesirable id impulses from reaching consciousness

College students faced with unsolvable problems eventually

give up and make only half-hearted attempts to solve new problems, even when the new problems can be solved easily. This behavior is probably due to _____ a) learned helplessness. b) contingency blocking. c) latent learning. d) response generalization.

A hungry baby who stops crying when his mother picks him up, because he has learned to associate being picked up with being fed, demonstrates which type of learning?

A. classical conditioning B. operant conditioning C. habituation D. modeling