Document Detail

The effect of practical portion size measurement aids on the accuracy of portion size estimates made by young adults.
MedLine Citation:
PMID:  15250844     Owner:  NLM     Status:  MEDLINE    
A barrier to controlling the amount of food consumed may be the difficulty consumers have in accurately estimating portion sizes. Although portion size measurement aids (PSMAs) can improve estimation accuracy, their bulk and/or cost tends to make them impractical for regular use. The purpose of this study was to investigate the effect on portion size estimation accuracy of two practical PSMAs: a 2-D PSMA (life size picture of tennis and golf balls) and 3-D PSMAs (tennis and golf balls). Young adults were randomly assigned to one of two groups and estimated the portion sizes of 36 foods divided into three equal sets. PSMAs were not used to estimate portion sizes in Food Set 1. Study group 1 (n = 57) used the 2-D PSMA and study group 2 (n = 56) used the 3-D PSMAs to estimate the portion sizes in Food Set 2. Neither group used PSMAs to estimate portion sizes in Food Set 3. Repeated measures anova indicated that both groups significantly improved estimation accuracy between Food Sets 1 and 2 and between Foods Sets 1 and 3. Thus, even short-term exposure to practical PSMAs may improve estimation accuracy and these improvements persist when the PSMA is no longer available. However, the accuracy rate for Food Set 2 was only about 60% indicating that a great deal of estimation error remains.
C Byrd-Bredbenner; J Schwartz
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Publication Detail:
Type:  Clinical Trial; Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  Journal of human nutrition and dietetics : the official journal of the British Dietetic Association     Volume:  17     ISSN:  0952-3871     ISO Abbreviation:  J Hum Nutr Diet     Publication Date:  2004 Aug 
Date Detail:
Created Date:  2004-07-14     Completed Date:  2004-10-25     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  8904840     Medline TA:  J Hum Nutr Diet     Country:  England    
Other Details:
Languages:  eng     Pagination:  351-7     Citation Subset:  IM    
Department of Nutritional Sciences, Rutgers University, New Brunswick, NJ 08901, USA.
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MeSH Terms
Analysis of Variance
Food* / classification
Models, Educational*
Reproducibility of Results
Sensitivity and Specificity
Size Perception*

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

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