Investigating the Effects of Altering Portion Size Reduction Awareness on Compensatory Eating Behaviour
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 108
- 试验地点
- 1
- 主要终点
- Total delayed post-fixed lunch meal energy intake
研究概览
简要总结
The present study aims to investigate whether energy intake is reduced when participants consume a reduced portion size (15% compared to the 'control' portion), and also to see whether awareness of this reduction affects energy intake.
详细描述
In the present study, all participants will participate in two sessions - the baseline session and the experimental session. In the baseline session, participants will be given ad libitum access to a lunch meal (followed by ad libitum access to dessert), and ad libitum access to a dinner meal (followed by ad libitum access to dessert). Then, after a washout period of between 1-6 weeks, participants will return to complete the experimental session, where they will be randomised to one of three conditions:
Condition 1 (control condition): The same as the baseline condition except that the lunch will be of a fixed portion which participants must consume all of - this portion size will be the same amount of food as was consumed in the ad libitum lunch meal in the baseline session (participants will be told that the amount of food served is the same as the amount they consumed in the baseline session).
Condition 2 (reduced aware condition): The same as the baseline condition except that the lunch will be of a fixed portion which participants must consume all of - this portion size will be 15% less than the amount of food consumed in the ad libitum lunch meal in the baseline session (participants will be told that the amount of food served has been reduced from the amount they consumed in the baseline session).
Condition 3 (reduced unaware condition): The same as the baseline condition except that the lunch will be of a fixed portion which participants must consume all of - this portion size will be 15% less than the amount of food consumed in the ad libitum lunch meal in the baseline session (participants will be told that the amount of food served is the same as the amount they consumed in the baseline session).
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 60 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •United Kingdom (UK) residents able to visit laboratory on campus in Liverpool, aged ≥ 18
- •Body Mass Index (BMI) between 18.5 and 32.5 kg/m2
- •Proficiency in English language
- •Self-report willingness to eat each of the test foods
排除标准
- •Current medication use which affects appetite
- •Currently or previously diagnosed with an eating disorder
- •Currently on a diet
- •Have any food allergies or intolerances
- •Are vegan
研究组 & 干预措施
Control Condition
Participants will be served a lunch - this will be of a fixed portion - this portion size will be the same amount of food as was consumed in the ad libitum lunch meal in the baseline session (participants will be told that the amount of food served is the same as the amount they consumed in the baseline session).
干预措施: Portion size manipulation (Behavioral)
Reduce aware condition
Participants will be served a lunch - this will be of a fixed portion - this portion size will be 15% less than the amount of food consumed in the ad libitum lunch meal in the baseline session (participants will be told that the amount of food served has been reduced from the amount they consumed in the baseline session).
干预措施: Portion size manipulation (Behavioral)
Reduced unaware condition
Participants will be served a lunch - this will be of a fixed portion - this portion size will be 15% less than the amount of food consumed in the ad libitum lunch meal in the baseline session (participants will be told that the amount of food served is the same as the amount they consumed in the baseline session).
干预措施: Portion size manipulation (Behavioral)
结局指标
主要结局
Total delayed post-fixed lunch meal energy intake
时间窗: Within 10 hours after intervention administered
Amount of energy consumed from the post-lunch snack box intake, dinner meal, dinner dessert, post-dinner snack box intake, additional energy intake
Total post-fixed lunch meal energy intake
时间窗: Within 10 hours after intervention administered
Amount of energy consumed from the lunch dessert, post-lunch snack box intake, dinner meal, dinner dessert, post-dinner snack box intake, additional energy intake
Immediate energy intake post-fixed lunch meal
时间窗: Within 30 minutes after intervention administered
Amount of energy consumed from the lunch dessert
次要结局
- Total intake of the ad libitum dinner meal(Within 4-5 hours after intervention administered)
- Post-lunch snack box intake(Within 4 hours after intervention administered)