Discuss some of the problems of definition, measurement, and cohort factors that make it difficult to study thedevelopment of cognitive functioning in adulthood.

In his investigation of sex differences, Erikson observed that, in their play, girls emphasize ________ space, whereas boys emphasize ________ space.

a) low; high b) outer; inner c) high; low d) inner; outer

When Pavlov placed food in the mouths of canine subjects, they began to salivate. The salivation was a(n)

a. unconditioned response. b. unconditioned stimulus. c. conditioned response. d. conditioned stimulus. e. discriminative stimulus.