In this focused methodological synthesis, the sample construction procedures of 110 second language (L2) instructed vocabulary interventions were assessed in relation to effect size–driven sample-size planning, randomization, and multisite usage. These three areas were investigated because inferential testing makes better generalizations when researchers consider them during the sample construction process. Only nine reports used effect sizes to plan or justify sample sizes in any fashion, with only one engaging in an a priori power procedure referencing vocabulary-centric effect sizes from previous research. Randomized assignment was observed in 56% of the reports while no report involved randomized sampling. Approximately 15% of the samples observed were constructed from multiple sites and none of these empirically investigated the effect of site clustering. Leveraging the synthesized findings, we conclude by offering suggestions for future L2 instructed vocabulary researchers to consider a priori effect size–driven sample planning processes, randomization, and multisite usage when constructing samples.

在这种集中的方法综合中，评估了 110 种第二语言 (L2) 指导词汇干预的样本构建过程与效应量驱动的样本量规划、随机化和多站点使用的关系。对这三个领域进行了调查，因为当研究人员在样本构建过程中考虑它们时，推理测试可以做出更好的概括。只有九份报告以任何方式使用效应量来计划或证明样本量的合理性，只有一份进行先验参考先前研究中以词汇为中心的效果大小的幂过程。在 56% 的报告中观察到随机分配，但没有报告涉及随机抽样。观察到的样本中大约有 15% 是从多个站点构建的，这些样本都没有根据经验研究站点聚类的影响。利用综合发现，我们最后为未来的 L2 指导词汇研究人员提供建议，以在构建样本时考虑先验效应大小驱动的样本规划过程、随机化和多站点使用。