The story of Sybil, a woman who had 16 separate personalities, illustrates multiple personality, which is a rare form of

Ernest didn't know whether the boy's locker room was located down the hallway to his right or the one to his left. Crossing his fingers, he decided to try the left hallway. Ernest's strategy for finding the locker room best illustrates the use of:

a. the belief perseverance phenomenon. b. the confirmation bias. c. the representativeness heuristic. d. the framing effect. e. trial and error.

Most episodes of insomnia are ______ and stem from ______

a. temporary; stressful events b. chronic; stressful events c. temporary; underlying psychological problems d. chronic; underlying psychological problems