Effect of Portion-control Training on Food Intake

The purpose of this study is to test whether food intake in response to large portion sizes differs between women who have received portion-control training and women who have not received such training. In a crossover design, women come to the laboratory on four occasions to eat a lunch of seven foods varying in energy density. Across meals, all foods are varied in portion size (100%, 125%, 150%, or 175% of baseline amounts). Food and energy intake is determined for each meal. Participants are from two groups: women who completed a one-year weight-loss trial in which they were trained in portion-control strategies, and women who had not received such training (community controls).

Inclusion Criteria:

• Participant in the Portion-Control Strategies Trial (NCT01474759) OR
• Community control who regularly eats three meals per day

Exclusion Criteria:

• Score on the Eating Attitudes Test indicating symptoms of disordered eating
• Score on the Zung or Beck questionnaires indicating symptoms of depression
• Food allergies or restrictions
• Dislike for foods served in the study