Currently, there is a lack of empirically evaluated prevention programs targeting hate speech among adolescents. This is problematic because hate speech jeopardizes adolescents’ well-being and social integration. To this end, this study aims to evaluate the short-term effects of the newly developed anti-hate speech prevention program, “HateLess. Together against Hatred”, on adolescents’ empathy, self-efficacy, and counter-speech. Eight hundred and twenty adolescents between 12 and 16 (M = 13.27, SD = 1.04) from 11 German schools participated in this study. More specifically, 567 adolescents participated in the one-week prevention program, and 253 participants were assigned to the control group. Repeated measures ANOVAs showed that HateLess was successful, as there was a significant increase in empathy, self-efficacy, and counter-speech in the intervention group from the pretest (T1) to the posttest (T2) one month after the intervention. In contrast, no changes were found among adolescents in the control group. A multilevel mediation model revealed that the effect of being a member of the intervention group on counter-speech was partially mediated via empathy and self-efficacy. The findings indicate that HateLess is an effective, cost-efficient approach to enhance adolescents’ counter-speech directly and indirectly by altering the skills they need to become informed citizens in democratic societies.

目前，缺乏针对青少年仇恨言论的经过实证评估的预防计划。这是有问题的，因为仇恨言论会危害青少年的福祉和社会融合。为此，本研究旨在评估新开发的反仇恨言论预防计划“HateLess”的短期效果。一起反对仇恨”，关于青少年的同理心、自我效能感和反言语。820 名 12 至 16 岁的青少年 ( M  = 13.27, SD = 1.04) 来自 11 所德国学校的学生参与了这项研究。更具体地说，567 名青少年参加了为期一周的预防计划，253 名参与者被分配到对照组。重复测量方差分析显示 HateLess 是成功的，因为干预后一个月从前测 (T1) 到后测 (T2)，干预组的同理心、自我效能感和反言语显着增加。相反，在对照组的青少年中没有发现变化。多层次中介模型表明，作为干预组的一员对反言的影响部分是通过同理心和自我效能来调节的。调查结果表明，HateLess 是一种有效的、