In a Phobia Treatment Study, the Participants Spend Three Hours

Multiple Choice

In a phobia treatment study, the participants spend three hours facing their fears. Post-treatment scores show significant improvement in overall distress levels when handling the feared objects, so the treatment is judged as effective by the researcher. To improve the study's design, the researcher can

A) increase the length of time for the treatment component.
B) repeat the study with a new set of participants for a more representative sample.
C) include a control group, which would receive some supportive counseling but not the actual treatment.
D) change to a correlational design since it is unethical to have participants experience fear as part of a study.