EJ
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- EJ
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Comments
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Dear S_T, Yes, the Bayesian results indicate evidence against the interaction. This is also evident from the posterior model probabilities [P(M|data)]. And I agree that this is unexpected, given the results from the classical analysis. These discre…
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Dear Yoni, These are some deep questions :-) First off, my current thinking is that it is statistically allowed to add covariates that correlate with the grouping variable (it is as if you are adding a factor to a regression model), as long you rea…
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Hi Meerkat, This is a "BayesFactor"-specific question, so I can't answer it confidently. It appears to me that you have several different (crossed) factors, so a linear mixed model would seem most appropriate, and then the best thing is t…
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Hi Kay, It would be good to see the exact analysis, for instance a screenshot of the critical outcome -- right now things remain somewhat abstract. I can always recommend a Bayesian analysis, of course :-) Cheers, E.J.
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Hi PDN, This is an interesting issue. I assume you are interested in a Bayesian analysis. One way would be to use contingency tables (or log-linear analyses) for the full 2x3 situation, and include order constraints. These order constraints you can…
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Hi Marios Unfortunately this is not yet possible. We are aware of the limitation and we are working on a comprehensive solution that allows all plots to be edited. But it may take a while before we get there. Cheers, E.J.
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Hi Luchins, I was a little confused by Eduard's message above. In general, if you want to compute a correlation between victory and the number of aces you have to take into account that victory is a binary variable. It seems you would need the poin…
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It is because the coefficients for categorical variables require a different prior structure, and this is still being sorted out in the BAS package. What you could do is use the Bayesian "ANOVA" (really a linear mixed effect model) and def…
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I'm not allowed to paste the svg file. Will try to find your Email address
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Not a strict timeline but it is the logical next step
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If you send me an Email I can forward you the internship report by a student, Tim de Jong, who worked on this. E.J.
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On the BayesianSpectacles.org blog you will find about 15 posts on "Redefine Statistical Significance". They explain how this can happen. Another explanation is given here: https://link.springer.com/article/10.3758/s13423-017-1343-3 Cheer…
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You can also implement this in WinBUGS and use Savage-Dickey (the Wetzels et al. 2011 PBR approach), or use Stan and the bridgesampling package. E.J.
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Hi Sarah, Interesting example! Here's my take on what's going on here. Basically, there is no contradiction. Yes, the credible interval just overlaps with zero, but that does not mean that should be strong evidence for excluding that predictor. The…
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I've forwarded your question to Don (who implemented this analysis).
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Hi MattO, You might want to check out this paper: http://www.ejwagenmakers.com/2016/LyEtAl2016JMP.pdf Effect size delta is defined as mu/sigma. As an aside, I was a MATLAB user myself, a bunch of my friends use MATLAB, but I have to say that the c…
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Yes, of course. We really ought to make this available on our webpage. I'll attend the relevant team members to this issue (one is on holiday, but I hope we can deal with this request quickly) Cheers, E.J.
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Hi Kris, Thanks for your feedback. Our programming team can help you, but in order to do this effectively, we hope that you can post the issue on our GitHub page (see explanation here: https://jasp-stats.org/2018/03/29/request-feature-report-bug-ja…
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My bad. This appears to be a bug. I will attend the team to this. Note: for bug reports, it is easiest to use our GitHub page (https://jasp-stats.org/2018/03/29/request-feature-report-bug-jasp/). Cheers, E.J.
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You can see from the icons that JASP guesses that "Altura" is a continuous variable -- hence the "density" on the y-axis; in contrast, "Religiao" is classified as a nominal variable -- hence the "frequency" on…
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That's weird. Perhaps there is a missing value (not indicated in the missing values list) present in one of the groups? Do you have a screenshot? E.J.
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You can use the multinomial chi-square but it requires some extra work. You have to indicate the expected and observed frequencies for each of the six cells -- importantly, in the multinomial chi-square each of the six cells needs a different name. …
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Hi Oliviero, We can help you out, but the communication with the programming team will be much more efficient if you use your GitHub page (for instructions see https://jasp-stats.org/2018/03/29/request-feature-report-bug-jasp/) Cheers E.J.
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Hi ttome, Suppose we have a 2x2 contingency table. This yields 4 cells; if you format your data set so that it can be analyzed with the multinomial chi square and you indicate the expected frequencies, you will get the identical result. If you want…
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Thanks MSB, I forgot this for a moment E.J.
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Ah, this is something that Tim did for us. Tim is on a trip around the world and may rejoin us, but that will take a few more months. Of course our JASP/R code online should demonstrate how this is done... E.J.
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OK. And you checked that it does not have anything to do with the missing values? So when you apply JASP to the data after removing the missing values, the results are unaffected? E.J.
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JASP ought to use the BayesFactor code. My first suggestion would be to run the analysis multiple times to get an indication of the variability in the outcomes. How systematic is it? E.J.
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Hi Peter, This is really something in between a feature request and a bug report (for which we hope you will use our GitHub page, see https://jasp-stats.org/2018/03/29/request-feature-report-bug-jasp/). What is probably going on is that the default…
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Hi ftr, This is true -- you cannot save files to the cloud without paying. However, there is a workaround. JASP allows you to log into the OSF, and you can upload and download files from any directory there. So that's a loophole that might make the…