How to do Harman’s Single Factor Test in SPSS

What is Harman’s single factor test?

• Harman’s single factor test is one technique to identify common method variance. If a single factor emerges or one general factor will account for the majority of the covariance among the measures then it is concluded that a substantial amount of common method variance is present

Step-by-step procedure in SPSS:

1. In SPSS, go to Analyze — Dimension reduction — Factor.
2. Throw in all the measurement items in the variables box.
3. Click the extraction button:
   • Method: Maximum likelihood (to be consistent with AMOS logarithm).
   • Make sure to check the unrotated factor solution.
   • Go to the extraction box and set Factors to extract: 1.
   • Click continue
4. Go to the rotation button — Click Method: None — Continue
   • Click OK
   • In the output, go to the total variance explained section — look at the % of variance column.