While task repetition is effective for improving oral fluency, some teachers are reluctant to use it in their classrooms due to the alleged negative perceptions of learners toward repetitive practice. To address this concern, the participants in the current study completed a posttask questionnaire probing their perceptions toward task repetition…

Research has suggested that long spacing (i.e., temporal intervals) within a training session facilitates second language vocabulary learning. Studies, however, have been limited to treatment that involved sessions for only initial learning but not subsequent relearning. Furthermore, most studies have investigated only the benefits of spacing…

In the coda chapter of the special issue on second language (L2) practice and cognitive psychology, we proposed a theoretical framework for optimizing and researching L2 practice (Suzuki, Nakata, & DeKeyser, 2019). Rogers and Leow's commentary (2020) raised three potential issues regarding this framework, and the present response article aims…

Recent research has called for the use of fine-grained measures that distinguish implicit knowledge from automatized explicit knowledge. In the current study, such measures were used to determine how the two systems interact in a naturalistic second language (L2) acquisition context. One hundred advanced L2 speakers of Japanese living in Japan…

This paper reports on the reanalysis of Suzuki's (2017) experiment and investigated the extent to which learning schedules influence automatization of second language (L2) morphology. Sixty participants were separated into two groups, which studied morphological rules for oral production under short-spacing (3.3-day intervals) and long-spacing…

Although researchers argue that studying semantically related words simultaneously (semantic clustering) inhibits vocabulary acquisition, recent studies have yielded inconsistent results. This study examined the effects of semantic clustering while addressing the limitations of previous studies (e.g., confounding of semantic relatedness with other…

Cognitive psychology research has shown that interleaving, wherein learners practice multiple skills or concepts at once, facilitates learning more than does blocking, wherein learners practice only one skill or concept at a time. Despite the advantage of interleaving over blocking observed across a number of domains, limited attention has been…