Video-image representations of body size were measured on a television monitor that was modified to give a display continuum that ranged from 50% under- to 50% over-estimation of objective size. Sixty-eight females who were undergoing weight reduction counseling were measured before and after treatment. All Ss judged themselves to be significantly more obese than they actually were, with a tendency for errors to be greatest among the more obese Ss. After therapy, more realistic estimates of their physiques ensued. A drop-out rate of 23% was recorded; the drop-outs saw themselves as significantly more obese than those who graduated from the program.