The Effect of Portion Sizes on Mood

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

Detailed Description
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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.

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

Conditions
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Mood, Eating Patterns

Intervention / Treatment
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* Other: Control
* Other: Increase Portion Size
* Other: Decrease Portion Size
* Other: Mixed Portions


Participation Criteria
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Eligibility Criteria
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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

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 35 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Single


Arms and Interventions

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

What is the study measuring?
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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 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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snack food (chips), fruit (red grapes) consumed in each condition, mood