Related Experiment Video
Updated: May 28, 2026
06:21
Concept Development and Use of an Automated Food Intake and Eating Behavior Assessment Method
Published on: February 19, 2021
Do techniques that increase fruit intake also increase vegetable intake? Evidence from a comparison of two
Janine Chapman1, Christopher J Armitage
1Centre for Research in Social Attitudes, Department of Psychology, University of Sheffield, Sheffield S10 2TP, United Kingdom. janine.chapman@sheffield.ac.uk
Appetite
|October 18, 2011
Summary
Separate instructions for fruit and vegetable intake intentions significantly boosted consumption of both. Combined intentions increased fruit but not vegetable intake, highlighting distinct strategies for each food group.
Area of Science:
- Behavioral Science
- Nutrition Science
- Public Health
Background:
- Dietary interventions often group fruits and vegetables, potentially overlooking unique consumption patterns.
- Implementation intentions are a key behavioral strategy for promoting dietary changes.
Purpose of the Study:
- To compare the effectiveness of separate versus combined implementation intention instructions on fruit and vegetable intake.
- To explore whether 'target' consumption or 'preparatory' action strategies are more effective for increasing fruit and vegetable intake.
Main Methods:
- A randomized controlled trial with 580 participants assigned to control, separate implementation intentions, or combined implementation intention groups.
- Analysis of fruit and vegetable intake based on the type of implementation intention instruction received.
Main Results:
- Separate implementation intentions significantly increased both fruit and vegetable intake.
- Combined implementation intentions increased fruit intake but not vegetable intake.
- 'Target' strategies were more effective for fruit intake, while 'preparatory' strategies showed promise for vegetable intake.
Conclusions:
- Tailoring implementation intentions to specific food groups (fruits vs. vegetables) is more effective than a combined approach.
- Distinct behavioral strategies may be necessary to optimize fruit and vegetable consumption interventions.
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