Wilcoxon T Test

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This is the non-parametric alternative to the Repeated Measures t Test.

Use this when your data is ordinal.

The null hypothesis claims there are no systematic differences in ranks between conditions.

The alternative hypothesis claims there are systematic differences in ranks.

Instead of using the raw data, this analysis uses difference scores (the raw score minus the mean).

Wilcoxon T Test in SPSS

 * 1) Click on 'Analyze' -> 'NonParametric Tests' -> '2 Related Samples'


 * 1) Move your before and after scores into the 'Pair 1' category in 'Test Pairs'


 * 1) Choose 'Wilcoxon' as the test type


 * 1) Click 'OK'


 * 1) Your output should appear