For Four Intercorrelated Variables:
This page will calculate the first- and second-order partial correlations for four intercorrelated variables, W, X, Y, and Z.
To proceed, enter the values of rWX , rWY , and so forth, into the designated cells below, then click the «Calculate» button. A negative value of r should be preceded by a minus sign: e.g., -.76. Do not enter a plus sign; all entered values are assumed to be positive unless preceded by "-". Values of r2 will calculated and entered automatically.
If you enter a value of N (providing N>9), the program will also calculate the values of t along with the associated two-tailed probability values. For the original correlations, df=N2; for the first-order partials, df=N3; and for the second-order partials, df=N4.
All P values are non-directional (two-tailed).
|1st Order Partial Correlations|
|2nd Order Partial Correlations|
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©Richard Lowry 2001-
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