Journal
PSYCHOLOGICAL SCIENCE
Volume 22, Issue 2, Pages 190-196Publisher
SAGE PUBLICATIONS INC
DOI: 10.1177/0956797610394662
Keywords
rewards; intrinsic motivation; eating; mere exposure; children
Categories
Funding
- MRC [G0701864] Funding Source: UKRI
- Cancer Research UK [14133] Funding Source: Medline
- Medical Research Council [G0701864, G0701864(85381)] Funding Source: Medline
- Medical Research Council [G0701864] Funding Source: researchfish
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Parents commonly use rewards to encourage children to eat healthfully, but this practice remains controversial because rewards are suspected of undermining children's intrinsic motivation. A cluster-randomized trial examined children's acceptance of a disliked vegetable over 12 daily taste exposures. These exposures were paired with a tangible reward, a social reward, or no reward, and the findings were compared with the results from a no-treatment control condition. Liking and intake of the vegetable were assessed in a free-choice consumption task at preintervention, postintervention, 1 month after intervention, and 3 months after intervention. Liking increased more in the three intervention conditions than in the control condition, and there were no significant differences between the intervention conditions. These effects were maintained at follow-up. Children in both reward conditions increased consumption, and these effects were maintained for 3 months; however, the effects of exposure with no reward became nonsignificant by 3 months. These results indicate that external rewards do not necessarily produce negative effects and may be useful in promoting healthful eating.
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