This study examined the effects of distributed practice on second language (L2) speech fluency development. A total of 116 Japanese L2 learners of English were randomly divided into experimental or control conditions. Learners assigned to the experimental groups engaged in four fluency training sessions either in a short-spaced (1-day interval) or long-spaced (7-day interval) condition. Although different learning trajectories were observed during the training phase, the posttests conducted 7 and 28 days after the training showed similar fluency gains for the two groups, indicating that short- and long-spaced conditions were equally effective for developing L2 fluency. The current study extends the line of research in distributed practice and task repetition for L2 fluency development.

中文翻译：

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分布式练习对第二语言流利度发展的影响

本研究探讨了分布式练习对第二语言 (L2) 言语流利度发展的影响。总共 116 名日本英语 L2 学习者被随机分为实验组和对照组。分配到实验组的学习者在短间隔（1 天间隔）或长间隔（7 天间隔）条件下进行四次流利度训练。尽管在训练阶段观察到不同的学习轨迹，但训练后 7 天和 28 天进行的后测试显示两组的流利度增益相似，表明短间隔和长间隔条件对于发展 L2 流利度同样有效。目前的研究扩展了二语流利度发展的分布式实践和任务重复的研究范围。