Emotions are implicated in the etiology and maintenance of binge eating (BE). It is largely unknown whether BE is more strongly tied to emotions for certain individuals. This study investigated whether beliefs about the function of eating moderate the relationship between positive and negative affect and the frequency of BE. A mixed eating disorder sample (n=105) prospectively reported their weekly BE frequency and positive and negative affect for 12 weeks after completing the Eating Expectancy Inventory. Results indicated that holding the expectancy that eating helps to relieve negative affect prospectively predicts higher frequencies of BE, and holding the expectancy that eating is pleasurable and useful as a reward predicts lower frequencies. Further, increases in negative affect were associated with increases in BE, and increases in positive affect were associated with decreases in BE. Neither of the hypothesized relationships between affect and BE was moderated by expectancies. However, an interaction between negative and positive affect was found, indicating that only the combination of high positive and low negative affect is specifically related to reduced BE. Holding specific expectancies about the function of eating and fluctuations in both positive and negative affect appear to be associated with BE among individuals with eating disorders. Cognitive interventions should target eating-related expectancies that may maintain BE behavior.
Keywords: Eating disorders; Eating expectancies; Negative affect; Positive affect.
© 2013.