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Active, Not Recruiting

NCT Number: NCT01725425

The Effect of Portion Sizes on Mood

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

Active, Not Recruiting

This study is active but is not currently recruiting participants.

Key information

Conditions

Mood Eating Patterns

Age range

18 year–35 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

The University of Tennessee-Knoxville

Knoxville, Tennessee, 37996-1920, United States

About this study

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:

  • Determine the effect of increasing portion sizes on mood.
  • Determine the effect of decreasing portion sizes on mood.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

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

Treatment and study plan

Control

Other

The control is designed to determine average mood.

Increase Portion Size

Other

The purpose is to determine whether a change in mood will occur.

Decrease Portion Size

Other

The purpose is to determine whether a change in mood will occur.

Mixed Portions

Other

The purpose is to determine if a change in mood will occur.

Primary outcomes

  1. Total grams of snack food consumed

    Time frame: 1 year

    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.

Secondary outcomes

  1. Total grams of fruit consumed

    Time frame: 1 year

    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.

Other outcomes

  1. Relative Reinforcing Value of Foods

    Time frame: 1 Year

    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.

Sponsors and collaborators

Lead sponsor

The University of Tennessee, Knoxville

Other

Registry information

Official study title

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

Important dates

Study start
2012
Primary completion
2018
Study completion
2025
First posted
Nov 12, 2012
Registry last updated
Apr 3, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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