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The most recent version of this article was published on 1 May 2007

Arch Dis Child. Published Online First: 14 February 2007. doi:10.1136/adc.2006.103259
Copyright © 2007 BMJ Publishing Group Ltd & Royal College of Paediatrics and Child Health
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Original articles

Eating in larger group increases food consumption

Julie C Lumeng 1* and Katherine H Hillman 1

1 University of Michigan, United States

* To whom correspondence should be addressed. E-mail: jlumeng{at}umich.edu.

Accepted 2 January 2007


*   Abstract

Objective: To determine if children’s food consumption is increased by the size of the group of children in which they are eating.

Design: Crossover study.

Setting: University preschool.

Participants: 54 children, ages 2.5-6.5 years.

Interventions: Each child ate a standardized snack in a group of 3 children, and in a group of 9 children.

Main Outcome Measures: Amount each individual child consumed, in grams.

Results: Amount eaten and snack duration were correlated (r = .71). The association between group size and amount eaten differed in the short (< 11.4 minutes) versus the long (> 11.4 minutes) snacks (p = .02 for the interaction of group size and snack duration). During short snacks, there was no effect of group size on amount eaten (16.7 ± SD 11.0 grams eaten in small groups v. 15.1 ± 6.6 grams eaten in large groups, p = .42). During long snacks, large group size increased amount eaten (34.5 ± 16.0 v. 26.5 ± 13.8, p = .02). The group size effect was partially explained by a shorter latency to begin eating, a faster eating rate, and reduced social interaction in larger groups.

Conclusions: Children consumed 30% more food when eating in a group of 9 children than when eating in a group of 3 children during longer snacks. Social facilitation of food consumption operates in preschool- aged children. The group size effect merits consideration in creating eating behavior interventions.

Keywords: child, eating, feeding behavior, social facilitation


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