Single-exposure messages for child sexual abuse prevention: a randomized controlled online trial testing educational and humanizing approaches.

TL;DR: A randomized controlled trial of 2,019 adults found that single-exposure educational and humanizing messages about child sexual abuse prevention changed immediate emotional responses but did not shift attitudes, knowledge, or behavioral intentions in the short term . The research suggests such interventions need repetition and integration into broader campaigns to be effective.

What the Study Found

Researchers in Spain and Portugal tested whether brief public health messages could improve how adults think and talk about child sexual abuse prevention. The study recruited 2,019 adults online and randomly assigned them to watch one of three intervention videos or a neutral control video. The interventions included an educational message focused on facts, a humanizing message designed to build empathy for survivors, and another humanizing message emphasizing prevention. Each participant completed measures of emotional state, stigma-related attitudes, knowledge about therapeutic options, openness to the topic, and stated willingness to seek more information.

The key finding was straightforward: the messages triggered immediate emotional responses. Adults exposed to any of the three interventions reported lower positive emotion and slightly higher arousal compared to the control group, with a medium effect size for emotional valence. However, these short-term affective changes did not translate into shifts in the attitudes researchers measured. Stigma scores, knowledge about prevention and treatment, openness to discussing the topic, and stated behavioral intentions to seek additional information showed no significant differences between intervention groups and control. All three message formats performed similarly, suggesting the specific approach (educational vs. empathy-focused vs. prevention-focused) made little difference.

An important secondary finding was the absence of harm. The researchers were cautious about potential downsides of discussing sensitive topics in public campaigns: messages might inadvertently increase stigma, trigger avoidance, or cause people to drop out of health initiatives. None of these adverse effects emerged. Dropout rates were comparable across intervention conditions, and there was no evidence of increased stigma or avoidance in any group. This is meaningful for public health practitioners designing prevention campaigns, as it suggests brief interventions on this topic, while not immediately effective, do not appear to backfire.

The authors note that single exposures to brief messages may simply be insufficient to change complex attitudes and behavioral intentions around child sexual abuse prevention. They propose that repeated messaging across multiple channels, integrated into comprehensive educational efforts, may be necessary to move beyond immediate emotional reactions toward sustained changes in knowledge and openness to prevention work. The study raises a pragmatic question for prevention communicators: what combination of frequency, format, and integration would actually shift public understanding and engagement on this topic?

What This Means for You

If you encounter public health campaigns on child sexual abuse prevention, recognize that initial emotional discomfort is a normal, expected response. The evidence suggests that single messages are unlikely to deeply change your attitudes or motivate action on their own. Meaningful shifts in knowledge and willingness to engage with prevention typically require repeated exposure and integration into broader educational contexts.

For organizations designing prevention campaigns, this study indicates that choosing between educational, empathy-based, or prevention-focused messaging formats may be less critical than ensuring messages reach people multiple times through coordinated channels. The lack of harm signals that fears about "triggering" public backlash from frank prevention communication may be overblown, though the absence of short-term attitude change suggests optimistic expectations about single-exposure campaigns should be tempered.

The research also underscores the distinction between immediate emotional impact and behavioral change. A message can move people emotionally without translating into action or attitude shift. Prevention communicators should set realistic expectations about what single exposures can accomplish and plan for sustained, multi-channel approaches if actual behavior change is the goal.

Study Details

Sources

Morais, R., et al. (2024). Single-exposure messages for child sexual abuse prevention: A randomized controlled online trial testing educational and humanizing approaches. *BMC Psychology*. PubMed: 42177569