As children mature, they become more aware that gender roles are, to some degree, social and arbitrary, and cognitive development theory predicts, therefore, that rigid gender role behavior should decrease after about the age of ____

Boys can inherit an X-linked trait from their:

A. mother only.
B. father only.
C. mother or father.
D. father's mother only.

The fact that you cannot be relaxed and agitated at the same time best illustrates the central concept in Joseph Wolpe's theory of

a. symptom substitution. b. object relations. c. reciprocal inhibition. d. human potential.