How to Run Harman's Single Factor Test in SPSS | Common Method Bias Explained

Worried about common method bias in your survey data? Harman's Single Factor Test is the quickest first check — and in this video I show you exactly how to run and interpret it in SPSS, step by step. When all your data comes from the same source (one questionnaire, one respondent, at one time), reviewers will often ask whether common method bias is inflating your relationships. Harman's Single Factor Test is the most widely reported way to address that concern. Important: Harman's Single Factor Test is a basic diagnostic, not a cure. This video also explains its limitations so you can report it correctly and know when stronger methods are needed. 🔔 Subscribe for a new research-methods video every Sunday. 💬 Got a question about common method bias in your own study? Drop it in the comments — I reply to every one.