A social psychologist has found 20 different variables that seem to affect willingness to take risks and wants to simplify these results by grouping them. The appropriate procedure is

Piaget suggested that, in some cases, two children of the

same age may be at different skill levels in a specific domain of cognitive ability. This claim makes it very difficult, if not impossible, to provide an argument against the developmental schedule forwarded by Piaget's theory. This is a major issue related to the principle of A) Occam's Razor. B) ruling out rival hypotheses. C) replicability. D) falsifiability.

According to Janis, groupthink ______

a. is an effective way to solve a problem b. leads to amiability taking precedence over judgment c. is an alternative to individual psychotherapy d. can succeed only in large, cohesive groups