One-Way ANOVA using SPSS
  1. Open your SPSS file.
  2. Click on Analyze.
  3. Click on General Linear Model .
  4. Click on Univariate.
  5. Highlight the dependent variable and slide it into the box labeled 'Dependent Variable' (red arrow below).
  6. Highlight the independent variable and slide it into the box labeled 'Fixed Factor(s)' (green arrow below).
  7. Click the Options button (purple arrow above).
  8. Highlight the independent variable and slide it into the box for 'Display Means for:' (red arrow above).
  9. Click Continue
  10. Click the 'Post Hoc' button (purple arrow below).

  11. Highlight the independent variable, and slide it into the box labeled 'Post Hoc Tests for' (red arrow below).
  12. Click the box to activate the Tukey test (green arrow below).
  13. Click Continue, then OK.

  14. Note the observed value for F, the degrees of freedom for the numerator and the denominator, the MSE, and the p-value.
  15. The means appear in the table at the bottom.

  16. The box below displays the results for the Tukey test. Remember that if two levels of your independent variable fall in the same box, they are not significantly different from one another. If they fall in different boxes, they are significantly different from one another. In the example below, Form 1 and Form 2 did not differ from one another, but both produced lower estimates than Form 3.