Open AccessCohen’s criteria for interpreting practical significance indicators: A critical study
Author(s) -
Ibrahim Said Humaid AlWahaibi,
Dawood Abdul Malik Al-Hadabi,
Hussein Ali Talib Al-Kharousi
Publication year - 2020
Publication title -
cypriot journal of educational sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.22
H-Index - 5
eISSN - 1305-905X
pISSN - 1305-9076
DOI - 10.18844/cjes.v15i2.4624
Subject(s) - statistics , statistical significance , significance testing , mathematics , econometrics , psychology
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.
Keywords: Cohen’s, criteria, practical, significance.