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compute.es (version 0.2.1)
Compute Effect Sizes
Description
This package contains several functions for calculating
and converting various statistics, such as a t-test or p-value
and sample size, to effect size estimates of d (mean
difference), g (unbiased estimate of d), r (correlation
coefficient), z (Fisher's z), and log odds ratio. The variance
of these estimates are also computed. These
calculation/conversion functions are a particularly useful
resource during the preliminary stages of a meta-analytic
project when deriving effect sizes from reported data. This
package uses recommended formulas as described in The Handbook
of Research Synthesis and Meta-Analysis (Cooper, Hedges, &
Valentine, 2009).