The Effect of Portion Sizes on Mood

The Impact of Portion Size of Foods on Mood in Normal Weight Adults 18-35

The purpose of this study is to investigate whether different portion sizes will effect overall mood.

Study Overview

• Status: Active, not recruiting
• Conditions: Mood; Eating Patterns
• Intervention / Treatment: Other: Control; Other: Increase Portion Size; Other: Decrease Portion Size; Other: Mixed Portions

Detailed Description

The objective of this investigation is to determine whether participants will have a change in mood based on the portion size of foods served. The specific aims of the study are:

1. Determine the effect of increasing portion sizes on mood.
2. Determine the effect of decreasing portion sizes on mood.

• Study Type: Interventional
• Enrollment (Estimated): 25
• Phase: Not Applicable

Contacts and Locations

Study Locations

• United States
  • Tennessee
    • Knoxville, Tennessee, United States, 37996-1920
      • The University of Tennessee-Knoxville

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 35 years (Adult)
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria:

• Age 18-35
• have a body mass index of 18.5 and 24.9 kg/m^2
• be an unrestrained eater( scoring less than 12 on the Three Factor Eating Questionnaire)
• Report Being a non-smoker

Exclusion Criteria:

• currently pregnant or nursing
• report being an athlete in training
• currently taking any medications that affect appetite or food intake
• Have a medical condition affecting eating or are currently following a therapeutic diet
• Report disliking foods used in the investigation
• Report having allergies to foods used in the investigation

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Crossover Assignment
• Masking: Single

Number of Arms

4

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Control; Participants will receive equal amounts of foods.	Other: Control; The control is designed to determine average mood.
Experimental: Increase Portion Size; Participants will receive increased portion sizes.	Other: Increase Portion Size; The purpose is to determine whether a change in mood will occur.
Experimental: Decrease Portion Sizes; Participants will receive decreased portion sizes.	Other: Decrease Portion Size; The purpose is to determine whether a change in mood will occur.
Experimental: Mixed Portion Sizes; Participants will receive mixed portion sizes.	Other: Mixed Portions; The purpose is to determine if a change in mood will occur.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Total grams of snack food consumed	The snack food consumed in this investigation is Lays Potato Chips (Frito-Lay Inc., Plano, TX). Participants will be provided 50 or 100 grams of this food at all sessions depending on which condition they are randomized into. The chips provided to participants in each condition will be measured in grams to the tenth decimal point on an electronic food scale (Denver Instrument Co., Arvada, CO) before and after the session. The weight of the container will also be measured. Total grams of chips consumed during the session will be determined by subtracting pre- and post-consumption weight of the chips.	1 year

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Total grams of fruit consumed	The fruit used in this investigation is red grapes. Participants will be provided 100 grams or 150 grams of red grapes depending on which of the four groups they are participating in. Each individual will go through all four conditions in this investigation. Fruit provided to participants in each condition will be measured in grams to the tenth decimal point on an electronic food scale (Denver Instrument Co., Arvada, CO) before and after the session. The weight of the container will also be measured. Total grams of fruit consumed during the session will be determined by subtracting pre- and post-consumption weight of fruit.	1 year

Other Outcome Measures

Outcome Measure	Measure Description	Time Frame
Relative Reinforcing Value of Foods	As part of the investigation, participants will play a computer game which assesses the relative reinforcing value of the foods used. The number of points earned for each of the foods will be used to assess the relative reinforcing value of the foods.	1 Year

Collaborators and Investigators

• Sponsor: The University of Tennessee, Knoxville
• Investigators: Principal Investigator: Hollie Raynor, PhD, University of Tennessee

Study record dates

Study Major Dates

• Study Start (Actual): October 1, 2012
• Primary Completion (Actual): December 31, 2018
• Study Completion (Estimated): December 31, 2024

Study Registration Dates

• First Submitted: November 8, 2012
• First Submitted That Met QC Criteria: November 9, 2012
• First Posted (Estimated): November 12, 2012

Study Record Updates

• Last Update Posted (Actual): June 22, 2023
• Last Update Submitted That Met QC Criteria: June 17, 2023
• Last Verified: June 1, 2023

More Information

Terms related to this study

• Keywords: mood; snack food (chips); fruit (red grapes) consumed in each condition
• Other Study ID Numbers: 8964B