Do empirically-derived personality subtypes relate to cognitive inflexibility in anorexia nervosa and bulimia nervosa?

Background: Accruing evidence suggests that personality-based approaches to eating disorder classification may offer several advantages over current diagnostic models, with prior research consistently identifying three personality-based groups characterized by either (1) high levels of impulsivity and dysregulation (termed the "undercontrolled" group), (2) high levels of rigidity and avoidance (termed the "overcontrolled" group), or (3) relatively normative levels of personality functioning (termed the "low psychopathology" group). Cognitive inflexibility (i.e.

Evaluating the role of binge planning and binge inevitability within affect regulation models of binge eating.

Affect regulation models posit that aversive affective states drive binge-eating behavior, which then regulates negative emotions. However, recent findings among individuals with binge-eating disorder (BED) suggest that food-related anticipatory processes may precede and potentially explain the negative affect thought to drive binge eating. Specifically, studies using ecological momentary assessment (EMA) demonstrate that the negative affective state of "Guilt" (from the Positive and Negative Affect Schedule) most strongly predicts later binge eating in the natural environment, and it has been hypothesized that planning a binge or feeling that a binge-eating episode is inventible may account for the increases in Guilt observed prior to binge episodes.

Examining the bidirectional longitudinal associations between body mass index and episodic memory following bariatric surgery.

Background: The relationship between obesity and episodic memory (i.e., conscious memory for specific events) is hypothesized to be bidirectional.

Behaviourally assessed negative urgency is uniquely associated with binge-eating frequency.

Objective: Binge eating appears to be associated with impulsivity, especially in response to negative affect (i.e., negative urgency).

An examination of state and trait urgency in individuals with binge-eating disorder.

Objective: Negative urgency (i.e., acting rashly when experiencing negative affect; NU), is a theorised maintenance factor in binge-eating type eating disorders.