To achieve an altered state of consciousness with transcendental meditation, Mary repeats a ____________ over and over again

Research on the base rate in connection with the representativeness heuristic has demonstrated that

a. people pay too much attention to the base rate in making probability judgments. b. people often reach the correct decision when the question is worded differently. c. training sessions are generally unsuccessful at getting students to use base-rate information appropriately. d. the conjunction fallacy explains why people pay so little attention to the base rate.

Using a pretest-posttest, nonequivalent control group design, Professor Moriarty takes a group of subjects who received the lowest scores on the pretest and, one day later, runs them through a program that

He believes, will help the subjects improve their scores. One week later, when the study is finished, Professor Moriarty finds that, indeed, the scores have improved with these subjects. What type of confound does he need to consider in this case? a. Maturation b. Interviewer bias c. Regression to the mean d. Experimenter bias