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Compensation for Smaller Portion Sizes and Portion Size Normality

NCT03731273 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 90

Last updated 2018-11-06

No results posted yet for this study

Summary

Reducing food portion size is a potential strategy to reduce energy intake. However it is unclear at what point consumers compensate for reductions in portion size by increasing energy intake from other items. The investigators tested the hypothesis that reductions to food portion size will only result in significant compensatory eating when the reduced portion size is no longer visually perceived as 'normal'. In two within-subjects experiments, participants (Study 1: N = 45, M BMI = 26.9; Study 2: N = 37, M BMI = 26.9; 51% female) were served different sized portions of a lunchtime meal on three occasions: a 'large-normal', a 'small-normal', and a 'smaller than normal' portion. Both the reduction from 'large-normal' to 'small-normal' and from 'small-normal' to 'smaller than normal' portions represented the same change in food volume and energy content (84g, 77kcal Study 1; 98g, 117kcal Study 2). Participants were able to serve themselves additional helpings of the same food (Study 1), or dessert items (Study 2).

Conditions

  • Portion Size

Interventions

BEHAVIORAL

portion size

Smaller than normal portion size - the intervention is the meal size perceived as 'smaller than normal' that participants are provided with during a lunchtime session in the laboratory. 'Small-normal' portion size - the intervention is the meal size perceived as 'small normal' that participants are provided with during a lunchtime session in the laboratory. 'Large normal' portion size - the intervention is the meal size perceived as 'large normal' that participants are provided with during a lunchtime session in the laboratory.

Sponsors & Collaborators

Study Design

Purpose
PREVENTION
Masking
NONE
Model
CROSSOVER

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2016-10-04
Primary Completion
2017-07-25
Completion
2017-07-25

Countries

  • United Kingdom

Study Locations

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Entities

Companies

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT03731273 on ClinicalTrials.gov