JohnnyB

Comments

• Hi Antonis, Thanks a lot for taking the time to point this out. You are absolutely correct - the wording in the analysis form will be updated in the next JASP release. The underlying analysis, thankfully, does use the correct version of the Wilcoxon…

  in Wrong wording in t-test Comment by JohnnyB April 2017
• Hi Biva, Happy to help, I'm glad that it got sorted out! Cheers, Johnny

  in What denominator does the Cohen's d use on JASP?? Comment by JohnnyB April 2017
• Hi Biva, Thanks again for your help! I took a look at the JASP files you sent us. I was under the impression that you were conducting two-sample t-tests, as you reported the means and sd's for both groups. However, in the JASP files I saw that you a…

  in What denominator does the Cohen's d use on JASP?? Comment by JohnnyB April 2017
• Hi Biva, I just ran some examples through both JASP and Lee Becker's calculator, and it seems that they provide the same output whenever the sample sizes in both groups are equal. If the sample sizes between groups differ, they indeed provide differ…

  in What denominator does the Cohen's d use on JASP?? Comment by JohnnyB April 2017
• Hi Andrew, I just took a look at this discrepancy, and what I found was that it is a general difference between SPSS and R in how they calculate the statistic. First off, The Mann-Whitney U and the Wilcoxon Rank Sum test are the same (Wilcoxon deve…

  in JASP and SPSS Mann Whitney p-values differ Comment by JohnnyB February 2017
• Hi Andy, Thanks for pointing out this discrepancy! I took a look at what JASP and SPSS do when computing the Levene's test statistic, with and without a covariate. First off, Levene's test can be viewed as an ANOVA on the absolute residuals of the A…

  in Levene's test (Rptd measures ANOVA or ANCOVA) - no change with covariate added Comment by JohnnyB December 2016