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How to calculate the effect size for the one sample Wilcoxon test in SPSS

After conducting the one sample Wilcoxon-test in SPSS with the result of a difference between sample median and population median (or hypothesized median), an effect size is needed to quantify/classify the magnitude of this effect. For the one sample Wilcoxon-test, r is suitable. ➡️ Watch next:    • Reporting results from one sample Wil...   SPSS does unfortunately not provide that effect size calculation. So, you have to do the calculation by hand. r is a simple division of the standardized test statistics and the sqaure root of the number of observations. Thanksfully, SPSS provides both in its output when doing a one sample Wilcoxon signed-rank test. Be aware that the classification of the effect size r is reasearch field specific. For the social and behavioral sciences, the paper Cohen, J. (1992), A Power Primer, p. 157 is usually cited: 📚 Cohen, J. (1992): Quantitative methods in psychology: A power primer. Psychological bulletin, pp. 155-159. ⏰ Timestamps: ============== 0:00 Introduction 0:10 Calculation of the effect size r 0:54 Classification of the effect size r If you have any questions or suggestions regarding Effect Size for the one sample Wilcoxon signed-rank test in SPSS please use the comment function. Thumbs up or down to decide if you found the video helpful. #statorials Support channel? 🙌🏼 =================== Paypal donation: https://www.paypal.com/paypalme/Bjoer... Amazon affiliate link: https://amzn.to/49BqP5H Thank you for your support! ♥