help cohend
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Title

cohend -- Calculates Cohen's d, Hedges' g, and the effect size (ES) correlation
>  (r) corrected for uneven group size.


Syntax

        cohend varname groupvar


Description


cohend computes Cohen's d, Hedges' g, and effect size (ES) correlations (r) for
the two variables specified in varlist. The first variable specified should
correspond to the dependent variable, and the second variable should correspond
to the grouping variable. These values are calculated from the equations
specified in Rosnow, Rosenthal, and Rubin (2000).

The command also displays the effect size corrected for uneven group size. This
should be used when the difference in cell size between the two groups is
large. The corrected version of Cohen's d is calculated from equation 14,
Hedges' g from equation 13, and ES r from equation 15 in Rosnow et al. (2000).


Examples

        . cohend dv condition

References

    Rosnow, R. L., Rosenthal, R., & Rubin, D. B. (2000). Contrasts and
        correlations in effect-size estimation. Psychological Science, 11(6),
        446-453.

Author

        David Tannenbaum, University of California, Irvine
        dtannenb@uci.edu

        cohend
        v1