NCT03811210

Using the Norm Range to Predict the Effect of Food Portion Size Reductions on Compensation Over 5 Days

Using the Norm Range to Predict the Effect of Food Portion Size Reductions on Compensation

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 39 (actual)
• Sponsor: University of Liverpool · Academic / Other
• Sex: All
• Age: 18 Years – 60 Years
• Healthy volunteers: Accepted

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. This could result in no overall benefit of reducing food portion sizes. The investigators tested the hypothesis that reductions to the portion size of components of a main meal will only result in significant compensatory eating when the reduced portion size is no longer visually perceived as 'normal'. In a crossover experiment, participants were served different sized portions during lunch and dinner over 5 days: a 'large-normal', a 'small-normal', and a 'smaller than normal' portion. Intake from all other meal components consumed in the laboratory were measured.

Conditions

• Portion Size

Interventions

Type	Name	Description
BEHAVIORAL	portion size	Smaller than normal portion size - the intervention is the main meal component size perceived as 'smaller than normal' that participants are provided with during lunch and dinner in the laboratory. Small-normal portion size - the intervention is the main meal component size perceived as 'small-normal' that participants are provided with during lunch and dinner in the laboratory. Large-normal portion size - the intervention is the main meal component size perceived as 'large-normal' that participants are provided with during lunch and dinner in the laboratory.

Timeline

• Start date: 2018-02-06
• Primary completion: 2018-12-07
• Completion: 2018-12-10
• First posted: 2019-01-22
• Last updated: 2019-01-24

Locations

1 site across 1 country: United Kingdom