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Nonsuicidal self-injury (NSSI) is a major public health concern. Web-based personalized feedback interventions (PFIs) may be a cost-effective and efficient way to treat NSSI. In order to develop a PFI, it is imperative to assess descriptive and injunctive norms. The current study examines descriptive and injunctive norms of NSSI within college students and adults in the community, comparing how perceived norms may differ for those who do or do not engage in NSSI. Study 1 calculated percentages of NSSI behavior within the student sample. Study 2 then examined perceived descriptive and injunctive norms between those with and without history of NSSI in both samples. Study 1 indicated that 19% of undergraduate students had histories of NSSI. Additionally, there was a general tendency to overestimate the percentage of people who engage in NSSI and the number of times a typical person engages in NSSI. Finally, those who engaged in NSSI believed that most people do not understand why individuals engage in NSSI; comparatively, the majority of people without history of NSSI still indicated that they understand why others would engage in NSSI. These research findings may be utilized in a PFI to reduce shame and NSSI behavior. [ABSTRACT FROM AUTHOR]

Personal Feedback Interventions (PFIs) have been widely used to reduce the amount of time and money individuals spend on gambling. A central component of these interventions is personalized information about an individual's gambling behavior, often in comparison to others' gambling. The purpose of the present review and meta-analysis was to evaluate these interventions in terms of content, mode of delivery, target sample, and efficacy. Sixteen interventions from 11 studies were reviewed. We found a small, statistically significant effect in favor of PFIs versus control (d = 0.20, 95% CI 0.12, 0.27). Six moderators of intervention efficacy were explored. These interventions appeared to be most efficacious when used in populations of greater gambling severity, when individuals were provided with gambling-related educational information, and when used in conjunction with motivational interviewing. Factors associated with reduced efficacy include in-person delivery of feedback without motivational-interviewing and informing participants of their score on a psychological measure of gambling severity. Efficacy did not vary as a function of college or community samples. PFIs are a low cost, easily disseminated intervention that can be used as a harm-reduction strategy. However, more substantial effects may be attained if used as part of a larger course of therapy. [ABSTRACT FROM AUTHOR]