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Psychosomatic Medicine 33:436-444 (1971)
© 1971 American Psychosomatic Society

Long-Term Food Regulation in the Obese and Nonobese

O. W. WOOLEY PhD1

1 Department of Psychiatry, Cincinnati General Hospital, Cincinnati, Ohio.; Department of Psychiatry, University of Cincinnati College of Medicine, Cincinnati, Ohio 45229

O. W. Wooley, PhD, Department of Psychiatry, Cincinnati General Hospital, N Pavilion, Cincinnati, Ohio 45229.

Six obese and 5 normal adult male subjects were fed an all-liquid diet ad libitum. For 3 obese and 3 normal subjects, the diet was high calorie during the first 5 days, and low calorie during the second 5 days. For the other subjects, the order was reversed. No subject could identify the caloric level by taste alone. Subjects showed incomplete caloric adjustment; the volume of their intake was greater when the food was low calorie than when it was high calorie, but they consumed more calories when the food was high calorie. The only variable which differentiated between obese and normal subjects was hunger ratings. The obese subjects' ratings increased progressively as the experiment progressed. Normal subjects' ratings were consistently low throughout the experiment. This difference in hunger ratings was attributed to a difference in response to the presence of nonexperimental food--ie, the obese subjects' hunger was appetitive, and the normal subjects' was physiologic.

Note:
Based on a dissertation submitted to the Psychology Department of the University of Illinois in partial fulfillment of the requirements for the PhD degree.

Submitted on December 28, 1970
Revised on March 22, 1971




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