A repeated-measures study comparing two treatments with n = 4 participants produces MD = 2 and SS = 75 for the difference scores. What is the estimated standard error for the sample mean difference?

According to Freud, the _____ accounts for unconscious aggressive and destructive impulses

a) superego b) life instinct c) libido d) death instinct

Researchers (Barker, Dembo, & Lewin, 1941) frustrated some children in a study by making them view attractive toys that were kept out of their reach. Based on research presented in the chapter, what is most likely to happen when they did allow the children to play with the toys? They found that these frustrated children were more likely to

a. play with the forbidden toys longer. b. ignore the forbidden toys. c. act aggressively with the toys. d. aggress toward the adult experimenters.