Document Detail

Bottomless bowls: why visual cues of portion size may influence intake.
MedLine Citation:
PMID:  15761167     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: Using self-refilling soup bowls, this study examined whether visual cues related to portion size can influence intake volume without altering either estimated intake or satiation. RESEARCH METHODS AND PROCEDURES: Fifty-four participants (BMI, 17.3 to 36.0 kg/m2; 18 to 46 years of age) were recruited to participate in a study involving soup. The experiment was a between-subject design with two visibility levels: 1) an accurate visual cue of a food portion (normal bowl) vs. 2) a biased visual cue (self-refilling bowl). The soup apparatus was housed in a modified restaurant-style table in which two of four bowls slowly and imperceptibly refilled as their contents were consumed. Outcomes included intake volume, intake estimation, consumption monitoring, and satiety. RESULTS: Participants who were unknowingly eating from self-refilling bowls ate more soup [14.7+/-8.4 vs. 8.5+/-6.1 oz; F(1,52)=8.99; p<0.01] than those eating from normal soup bowls. However, despite consuming 73% more, they did not believe they had consumed more, nor did they perceive themselves as more sated than those eating from normal bowls. This was unaffected by BMI. DISCUSSION: These findings are consistent with the notion that the amount of food on a plate or bowl increases intake because it influences consumption norms and expectations and it lessens one's reliance on self-monitoring. It seems that people use their eyes to count calories and not their stomachs. The importance of having salient, accurate visual cues can play an important role in the prevention of unintentional overeating.
Brian Wansink; James E Painter; Jill North
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Publication Detail:
Type:  Clinical Trial; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Obesity research     Volume:  13     ISSN:  1071-7323     ISO Abbreviation:  Obes. Res.     Publication Date:  2005 Jan 
Date Detail:
Created Date:  2005-03-11     Completed Date:  2005-06-23     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9305691     Medline TA:  Obes Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  93-100     Citation Subset:  IM    
Applied Economics and Marketing, 110 Warren Hall, Cornell University, Ithaca, NY 14853-7801, USA.
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MeSH Terms
Eating / psychology*
Feeding Behavior / psychology*
Middle Aged
Satiety Response / physiology
Visual Perception*
Comment In:
Obes Res. 2005 Jan;13(1):2   [PMID:  15761157 ]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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