Participants will view six 30-minute web-based serial drama modules designed to promote health.

Participants were asked if they had engaged in any of four prosocial bystander behaviors in the past 12 months (or since the last time completing the questionnaire). Items are scored as 0 = never performed, 1 = performed once, 2 = performed more than once. The numbers of participants who report engaging in at least one of four prosocial bystander behaviors at least once are presented here.

Knowledge of sexual consent is assessed with 15 items where respondents indicate how much they agree with each statement on a 5-point Likert scale of 1 to 5, where 1 = totally agree and 5 = totally disagree. This scale was adapted from fifteen items of the Sexual Consent Attitudes and Behaviors scale. Example items include "The need to ask for sexual consent DECREASES as the length of a dating relationship INCREASES" and "If your partner initiates sexual contact, it is okay to continue, even if she/he is drunk". Several items were reverse-coded to maintain common valence, and all response options were re-coded to range from 0-4. Total scores range from 0 to 60 where higher scores indicate greater knowledge about sexual consent.

The Gender Role Attitudes (GRA) scale measures men's gender role attitudes. The fifteen-item scale was adapted from the Gender Equitable Men (GEM) scale, a scale that was adapted for use in Nepal from the GEM scale, the Male Role Norms Inventory (MRNI)-Adolescent-revised scale, the Gender Attitudes Scale, and the International Men and Gender Equality Survey (IMAGES). Example items included: "A woman should obey her husband even when she disagrees with him" and "Men should be the ones to initiate dating relationships". Response options were coded using a 5-point Likert scale ranging from totally agree (1) to totally disagree (5). Two items needed to be reverse coded to maintain common valence, and all items were re-coded to range from 0-4, resulting in a theoretical score range of 0-60, with higher scores indicating more equitable attitudes.

Beliefs about what other men think about myths and realities of sexual violence was to be assessed with 24 items asking respondents to indicate how much they agree with each statement. Responses were to be given on a scale from 1 to 5 where 1 = totally agree and 5 = totally disagree. Total scores range from 24 to 120 with lower scores indicating that the respondent thinks men his age agree more with myths concerning sexual violence.

This 19-item scale was adapted from the Sexual Coercion in Intimate Relationships scale. Examples of items in the scale included: "Saying that a person would have sex with you if they truly love you" and "Asking your dating partner repeatedly to perform a sexual act after they have said that they do not want to". Response options were coded into "No" (0), "Yes" (1) and "Unsure" (2). Three items had to be reverse coded to maintain common valence. For analysis, "No" and "Unsure" were re-coded into one response option. Scores range from 0-19. Higher scores indicate a greater understanding of behaviors that are sexually coercive.

Rape attitudes were assessed with 28 items presenting myths about rape. Items are scored on a 5-point Likert scale from 1 to 5 where 1 = totally agree and 5 = totally disagree. The Rape Myth Attitudes (RMA) scale measures the extent of men's endorsement (or non-endorsement) of common rape myths. This scale was adapted from fourteen items of the Illinois Rape Myth Scale-Short Form and eleven items of the College Date Rape Attitude and Behavior Survey. Example items included: "When guys rape, it is usually because of their strong desire for sex" and "In most cases when a woman was raped, she was asking for it". Several items were reverse-coded to maintain common valence, and all response options were re-coded 0-4, resulting in a theoretical range of 0-112, with higher scores indicating less endorsement of rape myths.

Beliefs about consent in terms of alcohol use are assessed with 5 items adapted from the College Date Rape Attitudes and Behaviors scale where respondents indicate how much they agree with each statement. Responses are on a scale from 1 = totally agree to 5 = totally disagree. Items were re-coded to be grounded at zero. Total scores range from 0 to 20 where higher scores indicate more understanding of sexual consent under the influence of alcohol.

Empathy for rape victims was assessed with a modified version of the Rape Empathy Scale (RES). This assessment includes 17 items where participants were asked to choose between two statements, one of which reflected greater empathy towards rapists ("I understand the helplessness a rapist might feel during a rape, since he cannot control his actions") and one of which reflected greater empathy towards victims ("I understand the helplessness a victim might feel during a rape"). Responses are scored as 1 (more empathy for victim) or 0 (more empathy for perpetrator) and total scores range from 0 to 17 where higher scores indicate more empathy towards rape victims.

Total of all reporting groups

Participants randomized to this study arm received the adapted program of RealConsent. The RealConsent program is a novel, theory-driven, evidence-based serial drama and educational program tailored to young men and delivered in six episodes via the web. Participants viewed six 30-minute modules designed to prevent sexual violence in young men.

Acts of contact sexual violence using non-physical tactics (verbal coercion, lying, or intoxication) were assessed using 7 items from the Sexual Experiences Survey. The 7 items are scored on a scale from 0 (zero tactics) to 3 (multiple tactics), indicating how many times the participant reported engaging in a specific tactic in order to engage in contact sexual violence, including unwanted touching, rape, and attempted rape. The numbers of participants indicating they used non-physical tactics at least once (scores of 1 or 2) to perpetrate any of seven acts of contact physical violence (in the past twelve months, for the baseline assessment, or since last completing the questionnaire) are presented here.

This analysis includes participants who completed the assessments at the indicated time point.

Acts of non-contact sexual violence were assessed using 10 items from the Sexual Experiences Survey. The 10 items are scored on a scale from 0 (zero acts) to 3 (multiple acts), indicating how many times the participant reported engaging in an act. The numbers of participants indicating they engaged in at least one act of non-contact sexually violent behavior (scores of 1 or 2) in the past twelve months, for the baseline assessment, or since last completing the questionnaire are presented here.

This analysis includes participants who completed the assessments at the indicated time point.

Participants were asked if they had engaged in any of four prosocial bystander behaviors in the past 12 months (or since the last time completing the questionnaire). Items are scored as 0 = never performed, 1 = performed once, 2 = performed more than once. The numbers of participants who report engaging in at least one of four prosocial bystander behaviors at least once are presented here.

This analysis includes participants who completed the assessments at the indicated time point.

Knowledge of the law is assessed with 22 items where respondents indicate if they think the situations described are illegal (scored as 1), legal, but harmful (2), or not sexual violence (3), with example items including "Forcing a person to have oral sex" and "Pressuring someone to have sex." Items were re-coded such that responses indicating an accurate estimate or overestimate of the illegality and harms of sexual violence were coded as "1" and items indicating an underestimation as of the illegality and harms of sexual violence were coded as "0". Total scores range from 0 to 22 with higher scores indicating greater awareness of laws and consequences related to sexual violence.

This analysis includes participants who completed the assessments at the indicated time point.

Knowledge of sexual consent is assessed with 15 items where respondents indicate how much they agree with each statement on a 5-point Likert scale of 1 to 5, where 1 = totally agree and 5 = totally disagree. This scale was adapted from fifteen items of the Sexual Consent Attitudes and Behaviors scale. Example items include "The need to ask for sexual consent DECREASES as the length of a dating relationship INCREASES" and "If your partner initiates sexual contact, it is okay to continue, even if she/he is drunk". Several items were reverse-coded to maintain common valence, and all response options were re-coded to range from 0-4. Total scores range from 0 to 60 where higher scores indicate greater knowledge about sexual consent.

This analysis includes participants who completed the assessments at the indicated time point.

The Gender Role Attitudes (GRA) scale measures men's gender role attitudes. The fifteen-item scale was adapted from the Gender Equitable Men (GEM) scale, a scale that was adapted for use in Nepal from the GEM scale, the Male Role Norms Inventory (MRNI)-Adolescent-revised scale, the Gender Attitudes Scale, and the International Men and Gender Equality Survey (IMAGES). Example items included: "A woman should obey her husband even when she disagrees with him" and "Men should be the ones to initiate dating relationships". Response options were coded using a 5-point Likert scale ranging from totally agree (1) to totally disagree (5). Two items needed to be reverse coded to maintain common valence, and all items were re-coded to range from 0-4, resulting in a theoretical score range of 0-60, with higher scores indicating more equitable attitudes.

This analysis includes participants who completed the assessments at the indicated time point.

Beliefs about what other men think about myths and realities of sexual violence was to be assessed with 24 items asking respondents to indicate how much they agree with each statement. Responses were to be given on a scale from 1 to 5 where 1 = totally agree and 5 = totally disagree. Total scores range from 24 to 120 with lower scores indicating that the respondent thinks men his age agree more with myths concerning sexual violence.

Data for this outcome were not collected as the items performed poorly during pilot testing and this questionnaire was not administered to study participants.

This 19-item scale was adapted from the Sexual Coercion in Intimate Relationships scale. Examples of items in the scale included: "Saying that a person would have sex with you if they truly love you" and "Asking your dating partner repeatedly to perform a sexual act after they have said that they do not want to". Response options were coded into "No" (0), "Yes" (1) and "Unsure" (2). Three items had to be reverse coded to maintain common valence. For analysis, "No" and "Unsure" were re-coded into one response option. Scores range from 0-19. Higher scores indicate a greater understanding of behaviors that are sexually coercive.

This analysis includes participants who completed the assessments at the indicated time point.

Rape attitudes were assessed with 28 items presenting myths about rape. Items are scored on a 5-point Likert scale from 1 to 5 where 1 = totally agree and 5 = totally disagree. The Rape Myth Attitudes (RMA) scale measures the extent of men's endorsement (or non-endorsement) of common rape myths. This scale was adapted from fourteen items of the Illinois Rape Myth Scale-Short Form and eleven items of the College Date Rape Attitude and Behavior Survey. Example items included: "When guys rape, it is usually because of their strong desire for sex" and "In most cases when a woman was raped, she was asking for it". Several items were reverse-coded to maintain common valence, and all response options were re-coded 0-4, resulting in a theoretical range of 0-112, with higher scores indicating less endorsement of rape myths.

This analysis includes participants who completed the assessments at the indicated time point.

Beliefs about consent in terms of alcohol use are assessed with 5 items adapted from the College Date Rape Attitudes and Behaviors scale where respondents indicate how much they agree with each statement. Responses are on a scale from 1 = totally agree to 5 = totally disagree. Items were re-coded to be grounded at zero. Total scores range from 0 to 20 where higher scores indicate more understanding of sexual consent under the influence of alcohol.

This analysis includes participants who completed the assessments at the indicated time point.

Empathy for rape victims was assessed with a modified version of the Rape Empathy Scale (RES). This assessment includes 17 items where participants were asked to choose between two statements, one of which reflected greater empathy towards rapists ("I understand the helplessness a rapist might feel during a rape, since he cannot control his actions") and one of which reflected greater empathy towards victims ("I understand the helplessness a victim might feel during a rape"). Responses are scored as 1 (more empathy for victim) or 0 (more empathy for perpetrator) and total scores range from 0 to 17 where higher scores indicate more empathy towards rape victims.

This analysis includes participants who completed the assessments at the indicated time point.

Participants randomized to this study arm received the adapted program of RealConsent. The RealConsent program is a novel, theory-driven, evidence-based serial drama and educational program tailored to young men and delivered in six episodes via the web. Participants viewed six 30-minute modules designed to prevent sexual violence in young men.