The Mystery Motivator intervention has been shown to increase prosocial behavior among school-age children by capitalizing on the anticipation afforded by reward concealment or randomization. Although numerous evaluations have supported the effectiveness of the Mystery Motivator, the overall status of this intervention is still unknown. The purpose of the current meta-analysis was to quantify the effects of the Mystery Motivator for improving behavior outcomes in school-age children and determine if participant, setting, and intervention components moderate intervention effects. A systematic review of academic databases was conducted that yielded a total of 24 studies. These studies were evaluated for methodological rigor and analyzed for effects using Tau-U. Results indicate a strong overall effect for this intervention (Tau-U = .77 (CI95 [.73 to .80]). The results discussed and practical issues are considered for future research on the use of the Mystery Motivator to promote the academic and social-emotional development of children and adolescents.

中文翻译：

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针对挑战行为的神秘动机干预：荟萃分析

事实证明，神秘动机干预可以利用奖励隐藏或随机化带来的预期来增加学龄儿童的亲社会行为。尽管许多评估都支持神秘激励器的有效性，但这种干预措施的总体状况仍然未知。当前荟萃分析的目的是量化神秘动机对改善学龄儿童行为结果的影响，并确定参与者、环境和干预成分是否调节干预效果。对学术数据库进行了系统审查，共得出 24 项研究。这些研究使用 Tau-U 评估了方法的严谨性并分析了效果。结果表明该干预措施具有很强的总体效果（Tau-U = .77（CI95[.73 至 .80]）。讨论的结果和实际问题将被考虑用于未来关于使用神秘动机促进儿童和青少年的学业和社会情感发展的研究。