Correction

Correction

In the article entitled “A Tentative Model of Aggression on Inpatient Psychiatric Wards,” by Henk L. I. Nijman, M.Sc, Joost M. L. G. à Campo, M.D., Dick P. Ravelli, M.D., and Harald L. G. J. Merckelbach, Ph.D., in the June 1999 issue (pp. 832-834), arrows indicating the interaction of ward, patient, and staff variables were missing from Figure 1. The corrected figure appears below.