Bystander Efficacy Research Articles

Predicting Bystander Behavior to Prevent Sexual Assault on College Campuses: The Role of Self-Efficacy and Intent.

Bystander intervention has been increasingly applied to prevent sexual violence on college campuses. Its underlying theory assumes unidirectional relationships between variables, predicting that bystander behaviors (i.e., actions taken to intervene in sexual violence situations) will be influenced by bystander intentions (BI; i.e., likelihood to intervene in the future), which in turn will be affected by bystander efficacy (BE; i.e., confidence to intervene). One question for theory is whether a reciprocal relationship exists between BI and BE. We used structural equation modeling (SEM) with longitudinal data to test unidirectional and reciprocal causal relations between BI and BE. Participants (n=1390) were students at a northeastern US university. Four models were examined using SEM: (1) a baseline model with autoregressive paths; (2) a model with autoregressive effects and BI predicting future BE; (3) a model with autoregressive effects and BE predicting future BI; and, (4) a fully cross-lagged model. Results indicated that reciprocal causality was found to occur between BI and BE. In addition, a final model demonstrated indirect effects of a bystander intervention program on bystander behaviors through both BI and BE at different time points. Implications for theory and practice are described, and directions for future research discussed.

A randomized controlled trial of a multi-dose bystander intervention program using peer education theater.

This article reports findings from a longitudinal, experimental evaluation of a peer education theater program, Students Challenging Realities and Educating Against Myths (SCREAM) Theater. This study examines the impact of SCREAM Theater on a range of bystander-related outcomes (i.e. bystander intentions, bystander efficacy, perception of friend norms and bystander behaviors) in situations involving sexual violence and whether there was a differential impact of the program by participant sex. First-year college students completed three waves of surveys (pretest, first post-test and second post-test). All participants received one dose of the intervention during summer orientation after the pretest. After the first post-test, participants were randomly assigned to receive two additional doses, or to a control condition, in which they received no additional doses. Students in both one- and three-dose groups reported a number of positive increases. Overall, an intent-to-treat analysis (n = 1390) indicated three doses of the intervention during the first semester of college resulted in better outcomes than the one-time intervention during summer orientation alone. Although both male and female students' scores increased during the study period, female students consistently scored higher than male students on each outcome. The findings suggest that peer education theater holds promise for bystander intervention education on college campuses.

An Experimental Evaluation of Peer versus Professional Educators of a Bystander Program for the Prevention of Sexual and Dating Violence among College Students

Some argue that bystander intervention programs for sexual violence (SV) and dating violence (DV) prevention should be facilitated by peer educators. However, there is no evidence that peer educators are more effective than professionals at delivering program material. This study experimentally evaluated a bystander prevention program; half of participants were assigned to peer educators and half to professionals. Multilevel modeling showed that peer educators had a significantly better effect at reducing some SV- and DV-supportive attitudes and at increasing bystander efficacy. There were no differences in educators’ effectiveness at reducing other SV- and DV-related attitudes or at increasing bystander behaviors.

Participation in High School Sports and Bystander Intentions, Efficacy to Intervene, and Rape Myth Beliefs.

Debate exists as to whether male athletes are more prone to commit acts of sexual violence and maintain problematic attitudes about sexual assault. To contribute to the literature on this relationship, this study posed the following research questions: (1) Do those students who participated in high school sports and those who did not differ significantly in their attitudes about sexual violence and willingness to intervene as a bystander? Do these differ among types of rape myths and bystander intervention situations? (2) Within a group of athletes, are there significant differences by gender or type of sport (contact sport vs. non-contact?) To answer these questions, surveys were analyzed with a sample of recent high school graduates the summer before entering college (N = 3,588). Results indicate that there were only minor differences between those students who participated in high school varsity sports and those who did not. Students who participated in sports had greater acceptance of three out of five types of rape myths, and less willingness to intervene with perpetrators after an assault; however, the effect sizes were small. There were no significant differences for bystander efficacy. The interaction between sport and gender was significant, but contact sport was not. The findings suggest that there may be aspects of male athletic participation in sports that needs to be addressed, yet there also exists the potential for engaging athletes as leaders who can act as prosocial bystanders.

Predicting Improvement After a Bystander Program for the Prevention of Sexual and Dating Violence.

Although evidence suggests that bystander prevention programs are promising interventions for decreasing sexual violence and dating violence on college campuses, there have been no studies to date evaluating moderators of bystander program effectiveness. The current study evaluates whether different demographic characteristics, attitudes, knowledge, and behaviors at pretest predict change over a 6-month follow-up for students who participated in a bystander prevention program. Participants in the three assessments (pretest, posttest, 6-month follow-up) included 296 college students who were mandated to attend a bystander program during their first year orientation. Analyses showed that with few exceptions, the bystander program worked best for students who were most at risk given their pretest demographics and levels of attitudes condoning dating violence and sexual violence, bystander efficacy, and bystander behaviors. Results are discussed in terms of suggestions for future research.

When extraordinary injustice leads to ordinary response: How perpetrator power and size of an injustice event affect bystander efficacy and collective action

AbstractAlthough bystanders can play an integral role in the process of social change, relatively few studies have examined the factors that influence bystander collective action. The present research explores the effect of perpetrator power on bystander efficacy and collective action, as well as the moderating role of impact of the injustice event. Across two experiments, bystanders perceived that collective action would be less effective and were less willing to engage in collective action when a high‐power perpetrator engaged in injustice, compared with a low‐power perpetrator. These effects were moderated by impact of the injustice event, such that the effects of power were especially present under conditions of large impact (many victims), compared with small impact (fewer victims). Whereas the effect of the interaction of perpetrator power and impact on bystander efficacy was explained by perceptions of normativity of the injustice event, the effect of the interaction on bystander collective action was explained by bystander efficacy. Implications for bystander collective action and social change are discussed. Copyright © 2014 John Wiley & Sons, Ltd.

Gender differences in attitudes and beliefs associated with bystander behavior and sexual assault.

Sexual violence is a significant problem on many college campuses. Bystander education programs have been found to train individuals to act to prevent sexual and partner violence and improve the responses of peers to survivors. Limited evidence suggests that gender differences exist between males and females regarding both attitudes toward, and use of, bystander behavior, with females reporting more supportive attitudes and greater use of bystander behavior. The purpose of this study is to compare male and female college students on attitudes toward date rape, bystander efficacy, intention to act as a bystander, and actual use of bystander behaviors. A secondary aim explored gender differences in theoretically driven bystander behaviors and barriers to acting as a bystander. A convenience sample of 157 full-time undergraduate students aged 18-24 years completed survey measures of attitudes related to sexual and partner violence and willingness to help. Analysis of variance and chi-square were used to compare gender differences in scores. Significant gender differences were found for date rape attitudes, efficacy, and intention to act as a positive bystander. Men reported more rape-supportive attitudes and greater intention to act as a bystander than women, whereas women reported greater levels of bystander efficacy than men. The findings can be used in tailoring gender-specific components of bystander education programs for sexual assault prevention and intervention.

Integrating Religiosity and Pornography Use into the Prediction of Bystander Efficacy and Willingness to Prevent Sexual Assault

This study examined relationships between intrinsic and extrinsic religiosity, reasons for using Internet pornography, frequency of using Internet pornography during the last year, and the degree to which participants believed they were both confident in their efficacy and were willing to intervene to help prevent a sexual assault from occurring. Students volunteered to take an online survey as one of several options for course credit in a research participation system in a School of Education at a midwestern public university. Men's extrinsic religiosity was positively correlated with their use of Internet pornography and negatively correlated with willingness to intervene as a bystander. Men's intrinsic religiosity was negatively correlated with how many reasons they had for using pornography and negatively correlated with their use of pornography. Women's extrinsic religiosity negatively correlated with their bystander efficacy. Women's intrinsic religiosity was negatively correlated with their reasons for using pornography and their use of pornography. Women's use of pornography was negatively correlated with bystander efficacy. A regression revealed that three religiosity variables and two pornography variables predicted 19% of the variance in women's bystander efficacy.

Sorority Women’s and Fraternity Men’s Rape Myth Acceptance and Bystander Intervention Attitudes

Sorority women and fraternity men are more likely than other students to be survivors and perpetrators of sexual assault, respectively. The present study examined sorority and fraternity members’ rape myth acceptance, bystander efficacy, and bystander willingness to help in potential sexual assault situations. Sorority women were more rejecting of rape myths and were more willing to intervene than fraternity men. However, no difference in bystander efficacy was found. Implications of this contrast are discussed.

Bystander Education Training for Campus Sexual Assault Prevention: An Initial Meta-Analysis

The present meta-analysis evaluated the effectiveness of bystander education programs for preventing sexual assault in college communities. Undergraduates trained in bystander education for sexual assault were expected to report more favorable attitudes, behavioral proclivities, and actual behaviors relative to untrained controls. Data from 12 studies of college students (N = 2,926) were used to calculate 32 effect sizes. Results suggested moderate effects of bystander education on both bystander efficacy and intentions to help others at risk. Smaller but significant effects were observed regarding self-reported bystander helping behaviors, (lower) rape-supportive attitudes, and (lower) rape proclivity, but not perpetration. These results provide initial support for the effectiveness of in-person bystander education training. Nonetheless, future longitudinal research evaluating behavioral outcomes and sexual assault incidence is needed.

Validity for an Integrated Laboratory Analogue of Sexual Aggression and Bystander Intervention

This study sought to develop and validate an integrated laboratory paradigm of sexual aggression and bystander intervention. Participants were a diverse community sample (54% African American) of heterosexual males (N = 156) between 21 and 35 years of age who were recruited to complete the study with a male friend and an ostensibly single, heterosexual female who reported a strong dislike of sexual content in the media. Participants viewed a sexually explicit or nonsexually explicit film clip as part of contrived media rating task and made individual choices of which film clip to show the female confederate. Immediately thereafter, participants were required to reach consensus on a group decision of which film clip to show the female confederate. Subjecting a target to an unwanted experience with a sexual connotation was operationalized as selection of the sexually explicit video, whereas successful bystander intervention was operationalized as the event of one partner individually selecting the sexually explicit video but then selecting the nonsexually explicit video for the group choice. Results demonstrated that a 1-year history of sexual aggression and endorsement of pertinent misogynistic attitudes significantly predicted selection of the sexually-explicit video. In addition, bystander efficacy significantly predicted men's successful prevention of their male peer's intent to show the female confederate a sexually explicit video. Discussion focused on how these data inform future research and bystander intervention programming for sexual aggression.

Effects of The Men’s Program on U.S. Army Soldiers’ Intentions to Commit and Willingness to Intervene to Prevent Rape: A Pretest Posttest Study

Noncommissioned male officers in the U.S. Army stationed in Germany were trained to present a 1-hour rape prevention workshop--The Men's Program--to 237 enlisted male soldiers. A comparison group of 244 male soldiers received a briefing focused on reducing the individual's risk for experiencing sexual assault, discussion of myths and facts about sexual assault, and how to avoid being accused of sexual assault. Participants in The Men's Program experienced significant change in the predicted direction for bystander willingness to help, bystander efficacy, rape myth acceptance, likelihood of raping, and likelihood of committing sexual assault with low to medium effect sizes. Comparison group participants experienced no effect on these variables except for a significant decline in rape myth acceptance with a very low effect size. Between-group differences pointed to the efficacy of The Men's Program. Implications of these results for rape prevention programming in the military are discussed.

Implications for Sexual Assault Prevention: College Students as Prosocial Bystanders

Prosocial bystander interventions are promising approaches to sexual assault prevention on college campuses. Objective: To assess bystander attitudes among undergraduate students at a northeastern university. Participants: A convenience sample of 188 students from 4 undergraduate classes was surveyed during regularly scheduled class sessions. Methods: Participants completed a short survey on bystander efficacy, readiness to change, and barriers to intervention prior to the start of class. Results: The majority of students were not involved in activities or programs focused on sexual assault prevention. Although students agreed that violence could be prevented, they perceived many barriers to their own participation in intervention. Conclusions: There is a need for gender-targeted prevention programming that introduces the idea of prosocial bystander intervention, with a focus on increasing self-efficacy and lowering barriers.

Sisterhood May Be Powerful for Reducing Sexual and Intimate Partner Violence: An Evaluation of the Bringing in the Bystander In-Person Program with Sorority Members

Sorority members may be at greater risk than other college women for sexual violence and intimate partner violence (IPV). We evaluated the Bringing in the Bystander in-person program with sorority members who participated in the program (n = 30) compared with those who did not (n = 18). Results indicate that program participants showed increased bystander efficacy, likelihood to help, and responsibility for ending violence without unintended "backlash" effects. Implications include a call for future programming with more diverse sorority members over longer time. In addition, we discuss what the findings might mean for formal campus policies and practices for preventing sexual violence and IPV.

The Men’s Program: Does It Impact College Men’s Self-Reported Bystander Efficacy and Willingness to Intervene?

This study considered whether a rape prevention program could reduce men's rape myth acceptance, enhance the perceived effectiveness of college men's bystander behavior, and increase men's willingness to intervene as bystanders in potentially dangerous situations. As predicted, college men who experienced The Men's Program significantly increased their self-reported willingness to help as a bystander and their perceived bystander efficacy in comparison to college men who experienced the comparison condition. Men's Program participants also significantly decreased their self-reported rape myth acceptance in comparison with comparison condition participants. The college policy and rape prevention program planning implications of these findings are discussed.

Pornography Viewing among Fraternity Men: Effects on Bystander Intervention, Rape Myth Acceptance and Behavioral Intent to Commit Sexual Assault

College men's exposure to pornography is nearly universal, with growing viewing rates nationwide. Substantial research documents the harmful effects of mainstream, sadomasochistic, and rape pornography on men's attitudes and behavior related to sexual assault. The present study surveyed 62% of the fraternity population at a Midwestern public university on their pornography viewing habits, bystander efficacy, and bystander willingness to help in potential rape situations. Results showed that men who view pornography are significantly less likely to intervene as a bystander, report an increased behavioral intent to rape, and are more likely to believe rape myths.

Effects of a rape awareness program on college women: increasing bystander efficacy and willingness to intervene

AbstractAn experimental study evaluated the efficacy of a sexual assault risk‐reduction program on 279 college women that focused on learning characteristics of male perpetrators and teaching bystander intervention techniques. After seeing The Women's Program, participants reported significantly greater bystander efficacy and significantly greater willingness to help than before seeing the program. Participants outperformed a control group. Rape myth acceptance also declined among program participants. Implications for rape awareness programming are discussed. © 2010 Wiley Periodicals, Inc.

Gene-directed enzyme prodrug therapy: quantitative bystander cytotoxicity and DNA damage induced by CB1954 in cells expressing bacterial nitroreductase.

Clones of human colon carcinoma (WiDr), ovarian carcinoma (SK-OV-3), and Chinese hamster V79 cells expressing the nitroreductase enzyme (NR) from E. coli B were 52-, 225- and 177-fold respectively more sensitive to a 24-h incubation with the prodrug 5-(aziridin-1-yl)-2,4-dinitrobenzamide (CB1954) than the parent lines. The IC50s of non-NR-expressing bystander cells were measured in the presence of differing proportions of NR-expressing cells. The shift in IC50 was used to calculate a value for the bystander effect, termed the transmission efficiency (TE), which is the decrease in IC50 due to bystander effect as a percentage of the maximum decrease possible. The percentage of NR-expressing cells for which the TE was 50%, (the TE50) is a single datum of bystander efficacy. WiDr and V79 cell lines, had a similar TE50 of approximately 2%. SK-OV-3 gave a lower value of 0.3%. These TE50 correlate with concentrations of cytosolic NR activity, which is distinguished from endogenous DT diaphorase activity by kinetic differences. A novel method is described which enables both DNA crosslinks and drug-induced single-strand breaks to be simultaneously quantified in a sedimentation assay. Using this technique, bystander DNA damage was demonstrated in V79 cells, of approximately 50% of that in activator cells.