EFFECT SIZE-DRIVEN SAMPLE-SIZE PLANNING, RANDOMIZATION, and MULTISITE USE in L2

Joseph P. Vitta, Christopher Nicklin, Stuart McLean

Research output: Contribution to journalArticlepeer-review

Abstract

In this focused methodological synthesis, the sample construction procedures of 110 second language (L2) instructed vocabulary interventions were assessed in relation to effect size-driven sample-size planning, randomization, and multisite usage. These three areas were investigated because inferential testing makes better generalizations when researchers consider them during the sample construction process. Only nine reports used effect sizes to plan or justify sample sizes in any fashion, with only one engaging in an a priori power procedure referencing vocabulary-centric effect sizes from previous research. Randomized assignment was observed in 56% of the reports while no report involved randomized sampling. Approximately 15% of the samples observed were constructed from multiple sites and none of these empirically investigated the effect of site clustering. Leveraging the synthesized findings, we conclude by offering suggestions for future L2 instructed vocabulary researchers to consider a priori effect size-driven sample planning processes, randomization, and multisite usage when constructing samples.

Original languageEnglish
JournalStudies in Second Language Acquisition
DOIs
Publication statusAccepted/In press - 2021

All Science Journal Classification (ASJC) codes

  • Language and Linguistics
  • Education
  • Linguistics and Language

Fingerprint

Dive into the research topics of 'EFFECT SIZE-DRIVEN SAMPLE-SIZE PLANNING, RANDOMIZATION, and MULTISITE USE in L2'. Together they form a unique fingerprint.

Cite this