The calculation and use of effect sizes—such as d for mean differences and r for correlations—
has increased dramatically in second language (L2) research in the last decade …

This study assesses research and reporting practices in quantitative second language (L2)
research. A sample of 606 primary studies, published from 1990 to 2010 in Language …

This paper presents a set of guidelines for reporting on five types of quantitative data
issues:(1) Descriptive statistics,(2) Effect sizes and confidence intervals,(3) Instrument …

Adequate reporting of quantitative research about language learning involves careful
consideration of the logic, rationale, and actions underlying both study designs and the ways …

This article builds on the growing line of inquiry into methodological practices in quantitative
second language (L2) research. Specifically, the study uses synthetic techniques to examine …

Applied linguists are increasingly conducting meta-analysis in their substantive domains,
because as a quantitative approach for averaging effect sizes across studies, it is more …

Traditions of statistical significance testing in second language (L2) quantitative research
are strongly entrenched in how researchers design studies, select analyses, and interpret …

This chapter focuses on the use of graphic display for communication of information to those
in, or who wish to join, the community of second language (L2) researchers. Graphics are …

Research synthesis and meta‐analysis provide a pathway to bring together findings in a
given domain with greater systematicity, objectivity, and transparency than traditional …

Background Before we outline the major steps and key considerations when conducting a
metaanalysis, the term will be defined in both a narrow and broad sense. The narrower …