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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 simultaneous meal variety and portion size on food intake at a meal. Additionally, other individual characteristics will be examined for their influence on the effects of simultaneous variety and portion size on meal intake.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Simultaneous Variety, Small Portion | Experimental | 3 different foods served in a small portion. |
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| Simultaneous Variety, Large Portion | Experimental | 3 different foods served in a large portion. |
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| Single-Food, Small Portion | Experimental | 1 food served in a small portion. |
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| Single-Food, Large Portion | Experimental | 1 food served in a large portion. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Simultaneous Variety | Other | 3 different foods served |
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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 |
| Change in energy intake | Energy intake (kilocalories) of all meal components consumed, calculated from weight and energy density | Weeks 1, 2, 3, 4 |
| Measure | Description | Time Frame |
|---|---|---|
| Change in bite count | The number of bites of food during the meal | Weeks 1, 2, 3, 4 |
| 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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| Single-Food | Other | 1 food served |
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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 |
| 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 |
| 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 |
| Change in sip count | The number of sips of water during the meal | Weeks 1, 2, 3, 4 |
| 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 |
| 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 |
| Change in switching between bites and sips | The number of switches between bites and sips during the meal | Weeks 1, 2, 3, 4 |
| Change in switching between different foods | The number of switches between different foods | Weeks 1, 2, 3, 4 |
| 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 |
| Change in rating of desire to eat food samples | Measured on a 100-mm visual analogue scale ranging from not at all strong (0 mm) to extremely strong (100 mm), in answer to "How strong is your desire to eat [this food] right now?". 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 |
| 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) | From before the test meal to after the test meal in weeks 1, 2, 3, 4 |
| 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) | From before the test meal to after the test meal in weeks 1, 2, 3, 4 |
| 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) | From before the test meal to after the test meal in weeks 1, 2, 3, 4 |
| 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) | From before the test meal to after the test meal in weeks 1, 2, 3, 4 |
| Change in rating of prospective consumption | Measured on a 100-mm visual analogue scale ranging from nothing at all (0 mm) to a large amount (100 mm), in answer to "How much food do you think you could eat right now?". | From before the test meal to after the test meal in weeks 1, 2, 3, 4 |