multilevel (version 2.7)

cordif: Estimate whether two independent correlations differ

Description

Tests for statistical differences between two independent correlations using the formula provided on page 54 of Cohen & Cohen (1983). The function returns a z-score estimate.

Usage

cordif(rvalue1,rvalue2,n1,n2)

Arguments

rvalue1

Correlation value from first sample.

rvalue2

Correlation value from second sample.

n1

The sample size of the first correlation.

n2

The sample size of the second correlation.

Value

Produces a single value, the z-score for the differences between the correlations.

References

Cohen, J. & Cohen, P. (1983). Applied multiple regression/correlation analysis for the behavioral sciences (2nd Ed.). Hillsdale, NJ: Lawrence Erlbaum Associates.

See Also

rtoz cordif.dep

Examples

# NOT RUN {
cordif(rvalue1=.51,rvalue2=.71,n1=123,n2=305)
# }