David A. F. Haaga, PhD, professor of psychology at American University, Washington, DC, and a member of the scientific advisory board of The TLC Foundation for Body-Focused Repetitive Behaviors (BFRB.org). He conducts research on smoking cessation, depression and trichotillomania and is interested in cognitive behavioral therapy processes and outcomes.
The main BFRBs are trichotillomania (hair-pulling)…excoriation (skin-picking)…and onychophagia (nail-biting).
