Karens et al. (2016) conducted an experiment to measure the effect of the European Union (EU) brand on citizens’ trust in policies. Experiments conducted with economics students in Belgium, Poland, and The Netherlands showed a consistently positive and significant effect of applying the EU brand, on trust in the policies. This study presents seven replications conducted several years after Karens et al.'s experiments. The replications show no significant effects of the EU brand on trust in policies. These findings demonstrate that brand effects may vary over time. To identify a population effect size across all experiments, a meta-analysis was conducted. The meta-analysis shows that—overall—the EU-brand has a small but significant positive effect on citizens' trust in policies. The article tests earlier findings, and discusses intricacies of conducting replications. It elaborates explanations for the results in the replications, and the replication problems with experiments based on evaluative conditioning.

中文翻译：

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欧盟品牌对公民对政策信任的影响：复制实验

卡伦斯等人。(2016) 进行了一项实验，以衡量欧盟 (EU) 品牌对公民对政策的信任度的影响。对比利时、波兰和荷兰的经济学学生进行的实验表明，应用欧盟品牌对政策的信任具有持续的积极和显着影响。这项研究展示了 Karens 等人的实验几年后进行的七次重复。复制显示欧盟品牌对政策信任没有显着影响。这些发现表明，品牌效应可能会随时间而变化。为了确定所有实验中的群体效应大小，进行了荟萃分析。荟萃分析表明，总体而言，欧盟品牌对公民对政策的信任度有很小但显着的积极影响。这篇文章测试了早期的发现，并讨论了进行复制的复杂性。它详细说明了对重复结果的解释，以及基于评估性条件反射的实验的重复问题。