You Are Conducting a Study with Fifty-Eight Randomly Selected Participants

Multiple Choice

You are conducting a study with fifty-eight randomly selected participants in a dolophine rehabilitation program. You measure the withdrawal index for all the participants at the beginning of the study, after one week of SSRI treatment, and then after one week of art therapy. This study design may be problematic because of:

A) recall bias
B) degrees of freedom
C) carry-over effects
D) lack of independence