The Barratt Impulsiveness Scale, Version 11 (BIS-11; Patton et al., 1995) was used to assess levels of impulsivity. The BIS-11 is a self-report measure that consists of 30 items rated on a 4-point scale from rarely/never to almost always/always. The scale is comprised of three higher-order factor-based dimensions: Attentional Impulsivity (i.e., tendency to have rapid shifts in attention and become impatient with complexity), Motor Impulsivity (i.e., tendency to act in an immediate, unplanned way), and Non-Planning Impulsivity (i.e., absence of considering long-term consequences). The BIS-11 Total Score was used in the current study as it is also the most frequently used measure of impulsivity in eating disorder studies (e.g., Bruce et al., 2005; Steiger et al., 2005).
