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01-03-2009 | Uitgave 1/2009

Journal of Psychopathology and Behavioral Assessment 1/2009

Exploring Criterion Confounding in the Measurement of Binge Eating Symptoms and Negative Affect

Tijdschrift:
Journal of Psychopathology and Behavioral Assessment > Uitgave 1/2009
Auteurs:
Erin T. Barker, Nancy L. Galambos
Belangrijke opmerkingen
This research was supported by a Social Sciences and Humanities Research Council of Canada grant to N. Galambos and J. Maggs. Erin Barker was supported by a Social Sciences and Humanities Research Council of Canada Doctoral Fellowship and a University of Alberta Killam Memorial Scholarship.

Abstract

Common measures of eating disorder symptoms contain affect-related items. When associations between negative affect and eating disorder symptoms are examined, criterion confounding is possible. The current study explored whether criterion confounding biases estimates of relations between symptoms of binge eating and negative affect. Data were collected from first-year university student women via 14-day web-based daily diaries. The Minnesota Eating Behavior Survey (MEBS) measured daily symptoms of binge eating, and the Positive and Negative Affect Schedule (PANAS) measured daily negative affect. The inclusion of affect-related items in the MEBS biased mean level tests of negative affect, correlations of negative affect with symptoms of binge eating, and associations between the likelihood of reporting behavioral symptoms of binge eating and same-day negative affect. Converging results demonstrated the need to measure associated features and risk factors separately from problematic eating behavior symptoms.

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