The idea that human nature is selfish, aggressive, nasty, and competitive but that society constrains people to restrain these impulses is most associated with which famous philosopher?

Kelly's contribution to therapeutic methodology was

a) free imagination. b) role-playing and role reversal. c) systematic desensitization. d) a new method of dream interpretation.

A researcher can expect to obtain more accurate estimates of population parameters with

random samples from populations in which the variability in scores to be sampled is _____ . a. large; large b. small; small c. large; small d. small; large