Impulsivity dimensions and their associations with disinhibited and actual eating behaviour

Background: Previous research has suggested that there is an association between impulsivity, assessed via selfreport measures and behaviourally, and disinhibited eating patterns, but it remains unclear which specific dimension of impulsivity is the most salient in this relationship. Furthermore, it remains uncertain whether any such associations would extend to actual eating behaviours and food consumption. Aims: The present study aimed to examine whether impulsivity, assessed both behaviourally and via self-report, is associated with selfreported disinhibited and actual eating behaviour in a controlled eating task. Method: 70 women from a community sample (aged 21-35) completed the Disinhibition subscale of the Three Factor Eating Questionnaire (TFEQ), the Barratt Impulsiveness Scale (BIS-11), the Matching Familiar Figures Task (MFFT-20), and a behavioural food consumption task. Results: Bivariate correlational analyses revealed significant associations between self-report measure of impulsivity, the scores on the MFFT-20 (assessing reflection impulsivity), and self-report measure of disinhibited eating. All these measures were associated with overall food consumption in a taste task, with reflection impulsivity, that is poor ability to reflect on information before making a decision, having the strongest association with the amount of food consumed. Self-reported impulsivity was most strongly associated with disinhibited eating. Partial correlations controlling for BMI and age did not diminish any significant correlations within these relationships. Conclusions: Significant associations between both trait and behavioural (reflection) impulsivity, and selfreported disinhibited eating and actual eating behaviour were demonstrated. The implications of these findings on uncontrolled eating patterns in real life are discussed.