Dear All,
Can anybody send me the formula for performing a statistical test to
compare two (related) correlation coefficients, i.e. r(x,y) with r(x,z)
I thought that the Hotelling's t test was appropriate but according
to the abstract below, it may not be the case.
Any advice would be greatly appreciated.
Besides this, have a very happy new year.
Ioanna
Comparing correlated correlation coefficients
XIAO-LI MENG ; ROSENTHAL R. ; RUBIN D. B. ;
Psychological Bulletin, 1992, V vol. 111, n.1, pp. 172-175 (11 ref.)
Abstract
The purpose of this article is to provide simple but accurate methods
for comparing correlation coefficients between a dependent variable
and a set of independent variables. The methods are simple extensions
of Dunn & Clark's (1969) work using the Fisher z transformation and
include a test and confidence interval for comparing two correlated
correlations, a test for heterogeneity, and a test and confidence
interval for a contrast among k (>2) correlated correlations. Also
briefly discussed is why the traditional Hotelling's t test for
comparing correlated correlations is generally not appropriate in practice.
|