We present a review of second language researchers' use of cluster analysis, an advanced statistical method still uncommon but increasingly used to identify groups or patterns in a dataset and to examine group differences. After describing key methodological considerations in conducting cluster analysis, we present a methodological synthesis of 65…

Despite the prevalence of quantitative approaches in applied linguistics (AL) and second language acquisition (SLA) research (Gass, 2009), evidence indicates a need for improvement in analyzing and reporting SLA data (e.g., Larson-Hall & Plonsky, 2015). However, to improve quantitative research, researchers must possess the statistical…

First, we trace the history of second language acquisition (SLA) from early stages in the mid-twentieth century to today. We next consider the status of the field in today's research world with a particular focus on all aspects of methodology and, finally, we take a look at the future and discuss issues related to scientific rigor in light of Open…

This commentary discusses the issue of small samples in instructed second language acquisition research. We discuss the current state of affairs, and consider the disadvantages of small samples. We also explore other considerations regarding sample size, such as research ethics and ecological validity. We present a range of recommendations for…

This article explores ways in which a dialogue between researchers and practitioners can be bidirectional, effective, and beneficial for the two professional communities. We suggest concrete directions for second language (L2) research: (a) a collaborative mindset, (b) the nature of research, (c) venues for dialogue, and (d) institutional support.…

Instructed second-language acquisition (ISLA) research endeavours to make positive changes in pedagogical practices. In this regard, there is a recent debate concerning whether teachers are (or should be) willing to engage with research. To investigate the research-pedagogy link, the current case study conducted interviews with 12 EFL teachers in…

The importance of statistical knowledge in applied linguistics and second language acquisition (SLA) research has been emphasized in recent publications. However, the last investigation of the statistical literacy of applied linguists occurred more than 25 years ago (Lazaraton, Riggenbach, & Ediger, 1987). The current study undertook a partial…

Second language acquisition (SLA) as a discipline has not had a long history and, as any new discipline, has seen growing pains over the years. This research timeline traces the development of the increased and more sophisticated use of statistics in SLA research and the increasing demands for rigor in their use. Use of statistical procedures has…

Investigates English-as-a-Second-Language classes in Auckland, New Zealand to compare the frequency and characteristics of incidental focus on form episodes occurring in these classes. (Author/VWL)

This article reviews previous studies of the effects of implicit and explicit corrective feedback on SLA, pointing out a number of methodological problems. It then reports on a new study of the effects of these two types of corrective feedback on the acquisition of past tense -ed. In an experimental design (two experimental groups and a control…