![]() The present study was conducted to investigate differences in self-reported and actual emotion regulatory processes for both negative and positive emotions between those with and without a history of NSSI engagement. Interestingly, NSSI is also a prevalent behavior within both community and clinical populations, typically emerging in adolescence and associated with an increased risk of suicide and mental health difficulties such as depression and anxiety (e.g., Klonsky et al., 2003 Muehlenkamp and Gutierrez, 2007 Swannell et al., 2014). Although NSSI prevalence rates seem to vary according to age groups, they are consistently high amongst university students, with rates ranging from 15 to 39%, thus making the study of NSSI behaviors in this age group particularly important (e.g., Swannell et al., 2014 Cipriano et al., 2017). According to the International Society for the Study of Self-Injury (ISSS) and researchers in the field, NSSI includes behaviors such as cutting, scratching, self-hitting, and burning, but excludes extreme tattooing or body piercing ( International Society for the Study of Self-Injury, 2007 Nock and Favazza, 2009). Non-suicidal self-injury (NSSI) is the deliberate damaging of body tissue without the intent to die and for purposes not socially sanctioned ( International Society for the Study of Self-Injury, 2007 Nixon and Heath, 2009). These findings highlight the possibility that although individuals with a history of NSSI evaluate their ability to manage negative emotions as significantly worse than individuals with no history of self-injury, this may not reflect their actual emotion regulatory processes. In contrast, repeated measures ANOVAs on data from the mood induction task found no group differences in reactivity or regulation for either negative or positive emotions. Results from two-way MANOVAs and ANOVAs revealed those with a history of NSSI reported significantly greater difficulties in negative emotion reactivity and regulation than the no-NSSI comparison group however, no group differences emerged in self-reported reactivity or regulation of positive emotions. In a separate session, participants underwent both a negative and positive mood induction using a counterbalanced design and reported their experienced emotions. Participants completed self-report measures of negative and positive emotion reactivity and regulation. The sample consisted of 36 women with a recent history of NSSI within the last 2 years ( Mage = 20.06 SD = 1.51) and a comparison group with no history of NSSI ( n = 34 Mage = 20.15 SD = 1.54). The present study sought to investigate differences between women with and without a history of NSSI on: (a) self-reported general tendencies of negative and positive emotion reactivity, (b) self-reported general tendencies of negative and positive emotion regulation, and (c) emotion regulation reported in response to a positive and negative mood induction. Non-suicidal self-injury (NSSI) has consistently been associated with self-reported difficulties in emotion reactivity and the regulation of negative emotions however, less is known about the accuracy of these self-reports or the reactivity and regulation of positive emotions. 3Department of Psychology, University of Guelph, Guelph, ON, Canada. ![]() 2West Island Neuropsychology and Counseling Centre, Montreal, QC, Canada.1Department of Educational and Counselling Psychology, McGill University, Montreal, QC, Canada.Jessica Mettler 1 * Melissa Stern 2 Stephen P.
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