Post-hoc comparisons for Friedman test

As a non-parametric test of mean differences for dependent samples SPSS implements the Friedman test. However, SPSS does not provide post-hoc tests to decide which groups are significantly different from each other. Schaich and Hamerle (1984) as well as Conover (1971, 1980) propose such post-hoc tests that are based upon the mean rank differences of the groups. These procedures are detailed in Bortz, Lienert and Boehnke (2000, pp. 275).

Note: Since version 18 SPSS provides comparable post-hoc tests by default.


  • Bortz, J., Lienert, G. & Boehnke, K. (2000). Verteilungsfreie Methoden in der Biostatistik. Berlin: Springer. ISBN: 3540675906.
  • Conover, W. J. (1971, 1980). Practical nonparametric statistics. New York: Wiley. ISBN: 0471168513.
  • Schaich, E. & Hamerle, A. (1984). Verteilungsfreie statistische Prüfverfahren. Berlin: Springer. ISBN: 3540137769.


Post-hoc comparison for Friedman test (SPSS syntax file)
Post-hoc comparison for Friedman-Test (SPSS data file)

Zuletzt geändert: 2013-08-28 17:59:15
Timo Gnambs

Prof. Dr. Timo Gnambs

University of Linz
Altenberger Straße 69
4040 Linz
Austria / Europe

Leibniz Institute for Educational Trajectories
Wilhelmsplatz 3
96047 Bamberg
Germany / Europe

Email: timo@gn[REMOVE THIS PART]


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