The correlation coefficient effect size (r) is designed for contrasting two continuous variables, although it can also be used in to contrast two groups on a continuous dependent variable. Studies often report correlation cofficients. The menu option "Correlation and Sample Size" will output the Fisher's Z-r transformation and variance, both of which are useful for meta-analysis when given the correlation and sample size. The correlation can also be computed from a contingency table and from various other statsitical data. The correlation can also be computed from the standardized mean difference. Thus, any method available under the standardized mean difference menu option can be used and the results converted to a correlation. |
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