Measures
Nonsuicidal Self-injury. Inventory of Statements about
Self-Injury (ISAS; Klonsky & Glenn, 2009) was used to determine the
presence of NSSI history. The ISAS is a self-report measure that
assesses lifetime NSSI engagement across 12 forms of NSSI (i.e.,
self-cutting, self-burning, etc.); participants were determined to have
a lifetime history of NSSI if they reported at least two NSSI acts. The
psychometric properties of the ISAS have been supported (Klonsky &
Glenn, 2009; Glenn & Klonsky, 2011).
Emotion Dysregulation. The Difficulties in Emotion Regulation
Scale (DERS; Gratz & Roemer, 2004) is a self-report measure that
assesses six dimensions of emotion dysregulation; for the present study
only the overall index of emotion dysregulation was utilized. The DERS
internal consistency, re-test reliability, and construct and predictive
validity have been supported (Gratz & Roemer, 2004). Total scores in
this sample demonstrated adequate internal consistency (α = .90).
Interpersonal Stressor Interview. Consistent with past research
(Gratz et al., 2011), participants completed a semi-structured interview
about a recent upsetting interpersonal conflict (i.e., where they were
“very upset or angry”), wherein they were asked specific details about
the event (e.g., location), as well as specific emotions, physical
sensations, and thoughts that occurred at the time of the conflict. Each
interview took approximately 10 minutes to complete. All interviews were
transcribed verbatim for use in the current study.