Discuss the problems associated with using no-treatment control groups in experimental research on treatment effectiveness

What will be an ideal response?

Answer: In experimental research on psychotherapy, some clients are assigned to a no-treatment control group. These people are part of a waiting list, so they will receive psychotherapy at some future time. While waiting for therapy, people in no-treatment control groups often seek counseling and advice from family members, friends, or religious leaders. Thus, any improvement in their condition may not be due to spontaneous remission, but may be due to receiving informal psychological help.