Review paper

How Big Is “Big”? Interpreting Effect Sizes in L2 Research

Volume: 64, Issue: 4, Pages: 878 - 912
Published: Oct 15, 2014
Abstract
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. Interpretations of these effects, however, have been rare and, when present, have largely defaulted to Cohen's levels of small ( d = .2, r = .1), medium (.5, .3), and large (.8, .5), which were never intended as prescriptions but rather as a general guide. As Cohen himself...
Paper Details
Title
How Big Is “Big”? Interpreting Effect Sizes in L2 Research
Published Date
Oct 15, 2014
Volume
64
Issue
4
Pages
878 - 912
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