Journal Article

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

von Heyden, Maximilian, Westfal, Viola

2026

Overview

Background Child sexual abuse and exploitation, including online material depicting such acts, constitute a major public health concern. Prevention efforts likely benefit from public understanding and destigmatization, yet communication strategies on this topic face persistent misconceptions and strong emotional reactions. This randomized controlled online study examined whether brief educational and humanizing communication interventions influenced knowledge, attitudes, and behavioral intentions related to prevention, while avoiding adverse emotional or ethical effects. Methods A total of 2,019 adults from Spain and Portugal were recruited via an online panel and randomly assigned to one of four conditions: an educational message, a humanizing message with empathy focus, a humanizing message with prevention focus, or a neutral control message. Each intervention consisted of a short video and accompanying text presented as part of a health information campaign. Measures included affective state, stigma-related attitudes, literacy about therapeutic options, openness toward the topic, and behavioral intention to seek information. Results Exposure to any intervention message led to short-term changes in affective responses, with lower positive valence and slightly higher arousal compared to the control group (medium effect for valence, small for arousal). No significant differences emerged for stigma dimensions, knowledge, openness, or behavioral intentions. All three intervention formats performed similarly. The study did not identify measurable short-term adverse or rebound effects on stigma. Dropout rates did not differ across conditions, but languages. Conclusions Brief communication interventions elicited short-term affective responses without evidence of increased stigma or avoidance on the measured outcomes. While the present single exposures appear insufficient to change attitudes or behavior, such formats may serve as a foundation for repeated, multi-channel prevention messaging integrated into broader educational efforts. Trial registration German Clinical Trials Register (DRKS), DRKS00038927, retrospectively registered on 09/01/2026.

• Publisher: BioMed Central,BioMed Central Ltd,Springer Nature B.V,BMC
• Subject: Adolescent / Adult / Attitudes / Behavior / Behavior modification / Behavioral Science and Psychology / Child / Child Abuse, Sexual - prevention & control / Child Abuse, Sexual - psychology / Child pornography / Child sexual abuse / Child sexual abuse material / Child sexual abuse prevention / Children / Clinical Psychology / Clinical trials / Cognitive Psychology / Communication / Dehumanization / Empathy / Ethical aspects / Evaluation / Exploitation / False information / Female / Health aspects / Health behavior / Health education / Health Education - methods / Health Knowledge, Attitudes, Practice / Help seeking behavior / Humanization / Humanizing interventions / Humans / Internet / Internet/Web advertising / Intervention / Male / Methods / Middle Aged / Pedophilia / Perceptions / Portugal / Prevention / Psychoeducation / Psychology / Psychology Research / Public health / Public health communication / Public service advertising / Sex crimes / Sex industry / Sexual abuse / Short term / Social aspects / Social Stigma / Spain / Stigma / Stigma (Social psychology) / Stigma reduction / Young Adult