Rote learning has at its core Hartley's law of repetition.?

Which of the following is not an essential characteristic of posttraumatic stress disorder?

a) reexperience b) extreme anxiety c) hyperarousal d) avoidance

In regards to the same experiment, how is the main effect of the variable of choice

analyzed? A) By comparing the mean attitude change of subjects in the no-choice condition with the mean attitude change of those in the low-incentive condition B) By comparing the mean attitude change of subjects in the no-choice condition with the mean attitude change of those in the free-choice condition C) By comparing the mean attitude change of the subjects in the no-choice condition with the mean attitude change of those in the high-incentive condition D) By comparing the mean attitude change of the subjects in the free-choice condition with the mean attitude change of those in the low-incentive condition