Document Detail

Effects of a Web-based food portion training program on food portion estimation.
MedLine Citation:
PMID:  17346654     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: Assess the effects of a prototype computerized food portion tutorial (CFPT).
DESIGN: Participants were randomly assigned to estimate portion sizes for selected food items either prior to or following CFPT training (between groups), and those estimating before CFPT training re-estimated portions after training (within groups).
SETTING: Research offices.
PARTICIPANTS: Seventy-six adult participants without dietary restrictions.
INTERVENTION: The CFPT is a Web-based food portion training program that displays varied portions of 23 food items with user-controllable reference objects and viewing angles.
MAIN OUTCOME MEASURES: Estimated vs. weighed portions of food items selected for a meal.
ANALYSIS: Nonparametric tests were performed on estimated vs. weighed portion differences and on accuracy ratios between and within groups.
RESULTS: A significant difference was found between conditions, both within and between groups, on the discrepancy between estimated and weighed portions for a number of the food items. Training exposure, however, resulted primarily in a shift from underestimation to overestimation, not more accurate estimation.
IMPLICATIONS FOR RESEARCH AND PRACTICE: The CFPT produced a significant impact on food portion estimation but appeared to sensitize participants to underestimation errors, leading to overestimation errors. Computerization of food portion training programs holds promise for providing cost-efficient portion estimation training but requires further development and evaluation before being considered for clinical use.
William T Riley; Jeannette Beasley; Allison Sowell; Albert Behar
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Publication Detail:
Type:  Journal Article; Randomized Controlled Trial; Research Support, N.I.H., Extramural    
Journal Detail:
Title:  Journal of nutrition education and behavior     Volume:  39     ISSN:  1499-4046     ISO Abbreviation:  J Nutr Educ Behav     Publication Date:    2007 Mar-Apr
Date Detail:
Created Date:  2007-03-09     Completed Date:  2007-04-30     Revised Date:  2013-06-06    
Medline Journal Info:
Nlm Unique ID:  101132622     Medline TA:  J Nutr Educ Behav     Country:  Canada    
Other Details:
Languages:  eng     Pagination:  70-6     Citation Subset:  IM    
PICS Inc. Reston, Virginia, USA.
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MeSH Terms
Food / classification*
Health Education / methods
Middle Aged
Nutritional Sciences / education*
Size Perception*
Statistics, Nonparametric
Grant Support

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

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