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Journal article

An effect size primer: A guide for clinicians and researchers.

Ferguson C...(+1 more)

Professional Psychology: Research and Practice, vol. 40, issue 5 (2009) pp. 532-538

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Increasing emphasis has been placed on the use of effect size reporting in the analysis of social science data. Nonetheless, the use of effect size reporting remains inconsistent, and interpretation of effect size estimates continues to be confused. Researchers are presented with numerous effect sizes estimate options, not all of which are appropriate for every research question. Clinicians also may have little guidance in the interpretation of effect sizes relevant for clinical practice. The current article provides a primer of effect size estimates for the social sciences. Common effect sizes estimates, their use, and interpretations are presented as a guide for researchers. (PsycINFO Database Record (c) 2012 APA, all rights reserved)

Author-supplied keywords

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  • effect size
  • experimentation
  • for some time that
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  • nhst
  • null hypothesis testing
  • null-hypothesis significance testing
  • practical significance
  • significance
  • statistical
  • statistical analysis
  • statisticians had been aware
  • was

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