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Activity Number:
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114
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Type:
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Contributed
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Date/Time:
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Monday, July 30, 2007 : 8:30 AM to 10:20 AM
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Sponsor:
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Section on Survey Research Methods
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| Abstract - #308797 |
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Title:
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Using Factor Analysis and Cronbach's Alpha To Ascertain Relationships Between Questions of a Dietary Behavior Questionnaire
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Author(s):
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Eric Grau*+
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Companies:
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Mathematica Policy Research, Inc.
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Address:
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600 Alexander Park, Princeton, NJ, 08543,
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Keywords:
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nutrition ; dietary behavior ; factor analysis ; cronbach's alpha
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Abstract:
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Obesity and other dietary problems make it necessary to have a better understanding of dietary behavior and more effective nutrition education. A dietary behavior questionnaire was developed to measure outcomes of nutrition education as part of an effort to develop a standardized, flexible data collection tool. This questionnaire, which was separated into modules according to food groups, was field tested by Mathematica for internal consistency of responses to survey questions and the performance characteristics of individual and sets of questions. The field test data analysis identified questions that performed well and should be retained and some that performed poorly and should be either dropped or need further study. In this paper, we discuss the use of factor analysis and Cronbach's alpha to decipher the internal consistency of and relationships between questions within modules.
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- The address information is for the authors that have a + after their name.
- Authors who are presenting talks have a * after their name.
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