Evaluating the effectiveness of a brief mindfulness activity in university students with non-suicidal self-injury engagement

Current theoretical frameworks posit that engagement in non-suicidal self-injury (NSSI) is due to an inability to regulate one’s emotions. In turn, mindfulness-based interventions have been shown to enhance emotion regulatory processes in those who engage in NSSI. Objective. The purpose of the present study was to determine whether a brief mindfulness activity was differentially effective at increasing state mindfulness and decreasing stress following a stress induction task in university students with versus without a history of NSSI engagement. Method. The sample consisted of two groups of participants who identified as women: participants with a history of NSSI engagement (NSSI; n = 57; Mage=20.09, SD = 2.05) and participants without (no-NSSI; n = 87; Mage=20.22, SD = 1.94). All participants were asked to complete pre-intervention measures of state mindfulness and stress and were randomly assigned to either a mindfulness activity (body scan) or control task condition. Following the completion of their respective activities, a Stroop stress induction task was conducted and participants completed post-intervention measures of state mindfulness and stress. Results. Two 3-way mixed ANOVAs (Time X NSSI status X Condition) were conducted and revealed significant time by condition interactions for both state mindfulness, Wilk’s Λ = .93, F(1, 140) = 10.70, p = .001, ηp2 = .07, and stress, Wilk’s Λ = .97, F(1, 140) = 4.21, p = .04, ηp2 = .03. As such, both groups (NSSI/no-NSSI) demonstrated similar increases in state mindfulness and decreases in stress in response to the brief mindfulness activity following the stress induction. Implications for future research and practice will be discussed.