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Visual perceptions of portion size normality and intended food consumption: A norm range model
Ashleigh Haynes1, Charlotte A Hardman1, Alexis D J Makin1
1Institute of Psychology, Health & Society, University of Liverpool, L69 7ZA, UK.
Food Quality and Preference
|March 5, 2019
Summary
Smaller portion sizes reduce calorie intake. However, people don't compensate by eating more later if the portion seems normal, even if it's small.
Area of Science:
- Nutrition Science
- Behavioral Economics
- Psychology
Background:
- Portion size significantly influences energy intake.
- Understanding compensatory eating behaviors is crucial for weight management strategies.
Purpose of the Study:
- To test a norm range model explaining how portion size affects intended food intake.
- To investigate whether perceived normality of portion sizes influences compensatory eating.
Main Methods:
- Participants evaluated a wide range of portion sizes.
- Intended compensatory eating was assessed based on portion size perception.
Main Results:
- A broad spectrum of portion sizes were perceived as within the normal range.
- Portions deemed normal did not trigger compensatory eating intentions.
- Portions perceived as smaller than normal led to intentions to compensate.
Conclusions:
- The perception of portion size normality, rather than absolute size, is key.
- Interventions can leverage perceived portion size norms to influence intake without compensatory eating.
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