Use Partial correlation when you suspect the relationship between 2 variables to be influenced by other variables. The partial correlation coefficient is said to be adjusted or corrected for the influence by the different covariates.
Variable Y - Variable X
Select the 2 variables of interest.
The variables that you suspect to influence the relationship between the X and Y variables.
(Optionally) enter a filter in order to include only a selected subgroup of cases in the statistical analysis.
You can select a Logarithmic transformation for one or both variables.
The results window for Partial correlation displays:
- Sample size: the number of (selected) data pairs
- Correlation coefficient: Partial correlation coefficient, with P-value
- Altman DG (1991) Practical statistics for medical research. London: Chapman and Hall.
- Partial correlation on Wikipedia.