Testing is increasingly recognized as an important tool in learning. One form of testing often used in lectures, particularly recorded lectures, is interpolated testing wherein tests are interspersed throughout the lecture. Like testing in general, interpolated testing appears to benefit performance on content tests among other outcome variables (e.g., mind wandering). While beneficial, adding testing also increases instructional time. In the present investigation, we examine one strategy to mitigate the costs of this increase in instructional time in the context of recorded lectures. Specifically, we examine the interaction between increasing the playback speed of a recorded lecture and adding interpolated tests. Results demonstrate that the conjoint effects of these two interventions are largely additive. That is, the benefit of testing was as robust in a normal speed lecture and a lecture that was sped up 1.5×. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

中文翻译：

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加快授课速度，腾出时间进行检索练习：我们能否提高插值测试的效率？

测试越来越被认为是学习的重要工具。讲座（特别是录制的讲座）中经常使用的一种测试形式是插值测试，其中测试散布在整个讲座中。与一般测试一样，插值测试似乎有利于内容测试以及其他结果变量（例如走神）的表现。增加测试虽然有益，但也会增加教学时间。在本次调查中，我们研究了一种策略，以减轻录制讲座中教学时间增加的成本。具体来说，我们检查了提高录制讲座的播放速度和添加插值测试之间的相互作用。结果表明，这两种干预措施的联合效应在很大程度上是相加的。也就是说，测试的好处在正常速度讲座和加速 1.5 倍的讲座中同样强大。（PsycInfo 数据库记录 (c) 2023 APA，保留所有权利）。