Pennebaker, J. W., Kiecolt-Glaser, J. K., & Glaser, R. (1988). Disclosure of traumas and immune function: health implications for psychotherapy.

Can psychotherapy reduce the incidence of health problems? A general model of psychosomatics assumes that inhibiting or holding back one’s thoughts, feelings, and behaviors is associated with long-term stress and disease. Actively confronting upsetting experiences—through writing or talking—is hypothesized to reduce the negative effects of inhibition. Fifty healthy undergraduates were assigned to write about either …