Barbara J. Rolls, Ph.D.

photo of Barbara Rolls

Helen A. Guthrie Chair and Professor

Contact Information

226 Henderson Building
The Pennsylvania State University
University Park PA 16802


(fax) 814-863-8574


Ph.D., University of Cambridge, England, 1970

Research Interests

Psychological and environmental controls of food intake and food selection in normal weight and obese humans

Dietary strategies for weight management

Selected Publications

Kral, T.V.E., Rolls, B.J. (2011). Portion size and the obesity epidemic. In: The Oxford Handbook of the Social Science of Obesity – The Causes and Correlates of Diet, Physical Activity, and Obesity. Ed. John Cawley. Oxford University Press, Oxford, England, pp. 367-384.

Spill, M.K., Birch, L.L., Roe, L.S., and Rolls, B.J. (2011). Hiding vegetables to reduce energy density: an effective strategy to increase children’s vegetable intake and reduce energy intake. American Journal of Clinical Nutrition, 94:735-741.

Blatt, A.D., Roe, L.S., Rolls, B.J. (2011). Hidden vegetables: an effective strategy to reduce energy intake and increase vegetable intake in adults. American Journal of Clinical Nutrition, 93:756-763.

Obbagy, J.E., Condrasky, M., Roe, L.S., Sharp, J.L., Rolls, B.J. (2011). Chefs’ opinions about reducing the calorie content of menu items in restaurants. Obesity, 19:332-337.

Spill, M.K., Birch, L.L., Roe, L.S., Rolls, B.J. (2010). Eating vegetables first: the use of portion size to increase vegetable intake in preschool children. American Journal of Clinical Nutrition, 91:1237-1243.

Rolls, B.J., Roe, L.S., Meengs, J.S. (2010). Portion size can be used strategically to increase vegetable consumption in adults. American Journal of Clinical Nutrition, 91:913-922.

Rolls, B.J. (2010). Plenary Lecture 1: Dietary strategies for the prevention and treatment of obesity. Proceedings of the Nutrition Society, 69:70-79.

Rolls, B.J. (2009).The relationship between dietary energy density and energy intake. Physiology & Behavior, 97:609-615.

Flood-Obbagy, J.E. and Rolls, B.J. (2009). The effect of fruit in different forms on energy intake and satiety at a meal. Appetite, 52:416-422.

Leahy, K.E., Birch, L.L., and Rolls, B.J. (2008). Reducing the energy density of multiple meals decreases the energy intake of preschool-age children. American Journal of Clinical Nutrition; 88:1459-1468.

Courses Taught

NUTR 520 Readings in Nutrition

NUTR 597F Obesity: Causes, Consequences, and Treatment

NUTR 597G Readings in Ingestive Behavior

HDFS 597F Childhood Obesity

Strategic Themes

  • Domains of Health and Behavior