According to cognitive-developmental theory, gender constancy is usually acquired by age

Understanding people's attitudes is valuable to psychologists because they

a. are useful for studying the interaction between the conscious and the unconscious in our psyches. b. help to predict people's future behavior and responses. c. are the most important personality variables. d. represent the clearest expression of our underlying needs and emotions.

Obesity is considered a behavioral risk factor for many affluent nations. In the United States, it is currently estimated that what percent of all adults are overweight?

a. 38 percent b. 50 percent c. 66 percent d. 80 percent