Jacob Cohen

Publications62
h-index34
Citations190,727
Highly Influential Citations26,312
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Statistical Power Analysis for the Behavioral Sciences
  • Jacob Cohen
  • Mathematics
    The SAGE Encyclopedia of Research Design
  • 1 December 1969
Contents: Prefaces. The Concepts of Power Analysis. The t-Test for Means. The Significance of a Product Moment rs (subscript s). Differences Between Correlation Coefficients. The Test That a…
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A Coefficient of Agreement for Nominal Scales
CONSIDER Table 1. It represents in its formal characteristics a situation which arises in the clinical-social-personality areas of psychology, where it frequently occurs that the only useful level of…
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Applied multiple regression/correlation analysis for the behavioral sciences
Contents: Preface. Introduction. Bivariate Correlation and Regression. Multiple Regression/Correlation With Two or More Independent Variables. Data Visualization, Exploration, and Assumption…
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Statistical Power Analysis
pression, Journal of Clinical Psychiatry, 51, 61-69 (1990). 11. L.R. Baxter, Jr., J.M. Schwartz, B.H. Guze, J.C. Mazziotta, M.P. Szuba, K. Bergman, A. Alazraki, C.E. Selin, H.K. Freng, P. Munford,…
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The earth is round (p < .05)
After 4 decades of severe criticism, the ritual of null hypothesis significance testing (mechanical dichotomous decisions around a sacred .05 criterion) still persists. This article reviews the…
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QUANTITATIVE METHODS IN PSYCHOLOGY A Power Primer
One possible reason for the continued neglect of statistical power analysis in research in the behavioral sciences is the inaccessibility of or difficulty with the standard material. A convenient,…
The Equivalence of Weighted Kappa and the Intraclass Correlation Coefficient as Measures of Reliability
or weighted kappa (Spitzer, Cohen, Fleiss and Endicott, 1967; Cohen, 1968a). Kappa is the proportion of agreement corrected for chance, and scaled to vary from -1 to +1 so that a negative value…
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Eta-Squared and Partial Eta-Squared in Fixed Factor Anova Designs
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THINGS I HAVE LEARNED (SO FAR)
This is an account of what I have learned (so far) about the application of statistics to psychology and the other sociobiomedical sciences. It includes the principles "less is more" (fewer…
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Set Correlation and Contingency Tables
Set correlation is a realization of the general multi variate linear model, can be viewed as a multivariate generalization of multiple correlation analysis, and may be employed in the analysis of…
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