Projective techniques have a high validity, but low reliability as perceptual indicators of personality

In the experiment by Hunziker and Barr (1986), mothers in Group A were instructed to carry their infants for at least three hours a day, while the mothers in Group B were not given any special instructions. What were the results?

a. There were no differences between Group A and B infants. b. Both groups of infants cried the same number of times, but Group A infants cried half as long Group B infants. c. Group B infants learned to soothe themselves and cried less than Group A infants. d. Group B infants cried many more times during the day than Group A infants.

According to a Stice and colleagues (2007) study, about of eating disorder prevention programs were found to reduce risk factors and reduce current or future eating disorders

a. three-fourths; one-third b. all; 50% c. half; 29% d. one-fourth; 50%