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Study design has changed.
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| Name | Class |
|---|---|
| Jenny Craig, Inc. | INDUSTRY |
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The primary purpose of this study is to investigate the combined effects of meal variety and portion size on food intake at a meal. The study will also investigate relationships with eating microstructure such as eating rate and bite size. Additionally, other individual characteristics will be examined for their influence on the effects of variety and portion size on meal intake.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Sequential Variety, Small Portion | Experimental | 3 courses each consisting of a different food served in a small portion. |
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| Sequential Variety, Large Portion | Experimental | 3 courses each consisting of a different food served in a large portion. |
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| Simultaneous Variety, Small Portion | Experimental | 3 courses each consisting of 3 foods served in small portions. |
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| Simultaneous Variety, Large Portion | Experimental | 3 courses each consisting of 3 foods served in large portions. |
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| Single Food, Small Portion | Experimental | 3 courses each consisting of the same food served in a small portion. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Sequential Variety | Other | 3 courses each consisting of a different food |
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| Measure | Description | Time Frame |
|---|---|---|
| Change in intake by weight | Weight (grams) of all meal components consumed | Weeks 1, 2, 3, 4, 5, 6 |
| Change in energy intake | Energy intake (kilocalories) of all meal components consumed, calculated from weight and energy density | Weeks 1, 2, 3, 4, 5, 6 |
| Measure | Description | Time Frame |
|---|---|---|
| Change in bite count | The number of bites of food during the meal | Weeks 1, 2, 3, 4, 5, 6 |
| Change in meal duration | Duration of the meal in minutes |
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Inclusion Criteria:
Exclusion Criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Laboratory for the Study of Human Ingestive Behavior, The Pennsylvania State University | University Park | Pennsylvania | 16802 | United States |
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| ID | Term |
|---|---|
| D005247 | Feeding Behavior |
| ID | Term |
|---|---|
| D001522 | Behavior, Animal |
| D001519 | Behavior |
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| ID | Term |
|---|---|
| D005502 | Food |
| ID | Term |
|---|---|
| D000066888 | Diet, Food, and Nutrition |
| D010829 | Physiological Phenomena |
| D019602 | Food and Beverages |
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| Single Food, Large Portion |
| Experimental |
3 courses each consisting of the same food served in a large portion. |
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| Simultaneous Variety | Other | 3 courses each consisting of 3 foods |
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| Single Food | Other | 3 courses each consisting of the same food |
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| Small portion | Other | Small meal portion size |
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| Large Portion | Other | Large meal portion size |
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| Weeks 1, 2, 3, 4, 5, 6 |
| Change in mean eating rate | Mean food intake per minute (grams/minute), calculated by dividing meal food intake by meal duration | Weeks 1, 2, 3, 4, 5, 6 |
| Change in mean bite size | Mean food intake per bite (grams/bite), calculated by dividing meal food intake by bite count | Weeks 1, 2, 3, 4, 5, 6 |
| Change in sip count | The number of sips of water during the meal | Weeks 1, 2, 3, 4, 5, 6 |
| Change in mean drinking rate | Mean water intake per minute (grams/minute), calculated by dividing meal water intake by meal duration | Weeks 1, 2, 3, 4, 5, 6 |
| Change in mean sip size | Mean water intake per sip (grams/sip), calculated by dividing meal water intake by sip count | Weeks 1, 2, 3, 4, 5, 6 |
| Change in switching between bites and sips | The number of switches between bites and sips during the meal | Weeks 1, 2, 3, 4, 5, 6 |
| Change in switching between different foods | The number of switches between different foods | Weeks 1, 2, 3, 4, 5, 6 |
| Change in rating of pleasantness of the taste of food samples | Measured on a 100-mm visual analogue scale ranging from not at all pleasant (0 mm) to extremely pleasant (100 mm). This will be used to calculate Sensory-Specific Satiety | From before the test meal to after the test meal in weeks 1, 2, 3, 4, 5, 6 |
| Change in rating of prospective consumption of food samples | Measured on a 100-mm visual analogue scale ranging from none at all (0 mm) to a very large amount (100 mm), in answer to "How much of [this food] do you want to eat right now?". This will be used to calculate Sensory-Specific Satiety | Time Frame: From before the test meal to after the test meal in weeks 1, 2, 3, 4, 5, 6 |
| Change in rating of hunger | Measured on a 100-mm visual analogue scale ranging from not at all hungry (0 mm) to extremely hungry (100 mm) | Time Frame: From before the test meal to after the test meal in weeks 1, 2, 3, 4, 5, 6 |
| Change in rating of thirst | Measured on a 100-mm visual analogue scale ranging from not at all thirsty (0 mm) to extremely thirsty (100 mm) | Time Frame: From before the test meal to after the test meal in weeks 1, 2, 3, 4, 5, 6 |
| Change in rating of nausea | Measured on a 100-mm visual analogue scale ranging from not at all nauseated (0 mm) to extremely nauseated (100 mm) | Time Frame: From before the test meal to after the test meal in weeks 1, 2, 3, 4, 5, 6 |
| Change in rating of fullness | Measured on a 100-mm visual analogue scale ranging from not at all full (0 mm) to extremely full (100 mm) | Time Frame: From before the test meal to after the test meal in weeks 1, 2, 3, 4, 5, 6 |