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asking about suggestion " whether or not acceptable to use Wilconxon Sign Rank Test as pairwise comparsion and then Bonferroni correction by using alpha as 0.05 and calculate p value for post hoc"

  • 1.  asking about suggestion " whether or not acceptable to use Wilconxon Sign Rank Test as pairwise comparsion and then Bonferroni correction by using alpha as 0.05 and calculate p value for post hoc"

    Posted Fri October 18, 2024 02:01 PM

    Dear all,

     My study was small sample size and measured many variables simultaneously when subject received six stimulatory conditions. There was significant after Friedman Test and I have to conduct post hoc test but in SPSS, there could not automatically compute like Kruskal-Wallis test for post hoc. Moreover, I am new for R or Phyton, therefore, used Wilcoxon signed rank test for pairwise comparison and Bonferroni correction by using alpha as 0.05 and calculate p value for post hoc. That is the main things that I would like to ask for suggestion. Is this acceptable to calculate post hoc like this?

    Or

    Should I use repeated measured even data is no normal distribution? P.s; Here is what I found in my variables, there were mixing between no normal distribution and normal distribution among variables, and also could not transform due to negative value in the data. 



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    Phyu Wint
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  • 2.  RE: asking about suggestion " whether or not acceptable to use Wilconxon Sign Rank Test as pairwise comparsion and then Bonferroni correction by using alpha as 0.05 and calculate p value for post hoc"

    Posted Fri October 18, 2024 04:08 PM
    There is an extension command, STATS PADJUST, that takes a list of significance test p values and adjusts the levels by any one or more of six algorithms, including Bonferroni.  It will also give you a plot of the results.  These work for any set of significance levels, so it doesn't matter what procedure generated them.

    You can install this via Extensions > Extension Hub, and it will appear on the Analyze > Descriptive Statistics menu as Calculate adjusted p values.

    Each of the six methods has its own underlying assumptions, but Bonferroni and Benjamini-Hochberg are the most popular.

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  • 3.  RE: asking about suggestion " whether or not acceptable to use Wilconxon Sign Rank Test as pairwise comparsion and then Bonferroni correction by using alpha as 0.05 and calculate p value for post hoc"

    Posted Sat October 19, 2024 10:30 AM

    Dear Sir Jon Peck,

     I am really thankful for your reply. I try to install extension, however, it showed " My system doesn't meet requirements to install" and showed symbols as ! . Is there any solution about this?

    Thank you so much for your help.

    Best regards,

    Phyu Wint



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    Phyu Wint
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  • 4.  RE: asking about suggestion " whether or not acceptable to use Wilconxon Sign Rank Test as pairwise comparsion and then Bonferroni correction by using alpha as 0.05 and calculate p value for post hoc"

    Posted Sat October 19, 2024 11:37 AM
    What version of SPSS are you using?  This particular extension will work back as far as SPSS 18, but if you have a version of SPSS prior to version 28, you have to install the appropriate version of R and the R plugin.

    See this page for specifics.



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  • 5.  RE: asking about suggestion " whether or not acceptable to use Wilconxon Sign Rank Test as pairwise comparsion and then Bonferroni correction by using alpha as 0.05 and calculate p value for post hoc"

    Posted Mon October 21, 2024 02:21 AM

    Dear Sir Jon Peck,

     I saw extension will work as far as SPSS, however, it did not work for version 27. Therefore, I don't know how to solve this. If I contacted technical support will this work for me?

    Best regards,

    Phyu Wint

    It described like this


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    Phyu Wint
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