Failure of replication attempts in experimental psychology might extend beyond p-hacking, publication bias or hidden moderators; reductions in experimental power can be caused by violations of fidelity to a set of experimental protocols. In this article, we run a series of simulations to systematically explore how manipulating fidelity influences effect size. We find statistical patterns that mimic those found in ManyLabs style replications and meta-analyses, suggesting that fidelity violations are present in many replications attempts in psychology. Scholars in intervention science, medicine, and education have developed methods of improving and measuring fidelity, and as replication becomes more mainstream in psychology, the field would benefit from adopting such approaches as well.

中文翻译：

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没有保真度的情况下可以复制吗？


实验心理学中复制尝试的失败可能不仅仅限于p黑客行为、出版偏见或隐藏的主持人；实验能力的降低可能是由于违反一组实验方案的保真度而导致的。在本文中，我们进行了一系列模拟，系统地探讨操纵保真度如何影响效果大小。我们发现了模仿 ManyLabs 风格的复制和荟萃分析中发现的统计模式，这表明心理学的许多复制尝试中都存在保真度违规。干预科学、医学和教育领域的学者已经开发出了提高和测量保真度的方法，随着复制在心理学中变得更加主流，该领域也将从采用这些方法中受益。