Cohen’s criteria for interpreting practical significance indicators: A critical study

Ibrahim Said Humaid AlWahaibi*, Dawood Abdul Malik Yahya AlHadabi, Hussain Ali Talib AlKharusi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


The present study aimed at clarifying the various shortcomings of the Cohen’s criteria for the interpretation of the values of the practical significance indicators. The hypothetical data were used for two experimental and control groups and calculating the paired-samples t-test. To clarify the inadequacy of Cohen’s criteria in interpreting practical significance indicators, it was compared with another criterion which is Black’s Modified Gain Ratio. Through the compatibility of mathematical equations to calculate the practical significance and the values of the interpretations of the correlation coefficient, the present study suggested that a criterion for the practical significance should be as follows: small when the values of the index (d) are less than (0.631), medium when the values are between 0.631 and 1.50 and large when the values are equal to or greater than (1.51). The study showed the justifications that distinguish this criterion from the Cohen criterion.

Original languageEnglish
Pages (from-to)246-258
Number of pages13
JournalCypriot Journal of Educational Sciences
Issue number2
Publication statusPublished - Apr 30 2020


  • Cohen’s
  • Criteria
  • Practical
  • Significance

ASJC Scopus subject areas

  • Education


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