Professor Johns Is Performing an Experiment to Test Hypnosis as a Treatment

Multiple Choice

Professor Johns is performing an experiment to test hypnosis as a treatment for smoking. He is trying to decide which type of experimental design will be appropriate for the study. Which would you suggest?

A) He should use a non-experimental design
B) He should use a within-subjects design
C) He should use a between-subjects design, so that each subject can act as their own control
D) He should use a between-subjects design because of carryover effects