Articlegold2014

Measuring eating disorder attitudes and behaviors: a reliability generalization study

David H. Gleaves · Crystal A. Pearson · Suman Ambwani · Leslie C. Morey

64 citations0/0 files storedJournal of Eating Disorders

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Eating Disorders and Behaviors Psychometric Methodologies and Testing Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes

Abstract

BACKGROUND: Although score reliability is a sample-dependent characteristic, researchers often only report reliability estimates from previous studies as justification for employing particular questionnaires in their research. The present study followed reliability generalization procedures to determine the mean score reliability of the Eating Disorder Inventory and its most commonly employed subscales (Drive for Thinness, Bulimia, and Body Dissatisfaction) and the Eating Attitudes Test as a way to better identify those characteristics that might impact score reliability. METHODS: Published studies that used these measures were coded based on their reporting of reliability information and additional study characteristics that might influence score reliability. RESULTS: Score reliability estimates were included in 26.15% of studies using the EDI and 36.28% of studies using the EAT. Mean Cronbach's alphas for the EDI (total score = .91; subscales = .75 to .89), EAT-40 (total score = .81) and EAT-26 (total score = .86; subscales = .56 to .80) suggested variability in estimated internal consistency. Whereas some EDI subscales exhibited higher score reliability in clinical eating disorder samples than in nonclinical samples, other subscales did not exhibit these differences. Score reliability information for the EAT was primarily reported for nonclinical samples, making it difficult to characterize the effect of type of sample on these measures. However, there was a tendency for mean score reliability to be higher in the adult (vs. adolescent) samples and in female (vs. male) samples. CONCLUSIONS: Overall, this study highlights the importance of assessing and reporting internal consistency during every test administration because reliability is affected by characteristics of the participants being examined.

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References

1951Coefficient Alpha and the Internal Structure of Tests 2000Practical Meta-Analysis 2015Methods of Meta-Analysis: Correcting Error and Bias in Research Findings 1994Assessment of eating disorders: Interview or self‐report questionnaire?1982The Eating Attitudes Test: psychometric features and clinical correlates 1983Development and validation of a multidimensional eating disorder inventory for anorexia nervosa and bulimia 1995The Handbook of Research Synthesis.1979The Eating Attitudes Test: an index of the symptoms of anorexia nervosa

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