Biofeedback Treatment for Functional Constipation

The purpose of this randomized, controlled trial is to examine how well biofeedback treatment works to improve constipation. The study is comparing two kinds of biofeedback treatment: 1) anorectal-specific biofeedback therapy and 2) generalized biofeedback therapy using relaxation techniques. The study will also examine which medical and psychological factors determine biofeedback success for treating constipation, such as bowel habits, emotional reactions to constipation, and levels of stress and psychological distress.