Under free-running conditions, longer periods of wakefulness and are usually followed by

Half the questions on a comprehensive final exam on general psychology focus on psychobiology. This test probably does not have ______

a. content validity c. criterion-related validity b. reliability d. standardization

In an interrupted time-series design, regression to the mean is more plausible when subjects

a. fail to show up for the study. b. in the pretest, have scores that are unusually high or low. c. in the pretest, have scores that are near the average of the distribution. d. in the posttest, fail to complete the task.