EJ
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- EJ
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Comments
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Hi MJS, For a scale this discrete, a nonparametric density plot (using "density" in R) is not useful. There are no values on the y-axis because the units are not relevant -- the histogram has been rescaled so that the area under the curve …
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As long as the % is reasonably small (and it almost always is) there's no reason to report it. For ANOVA it can sometimes be a little bigger, but there we added the option to collect more samples to decrease the %. So is a a measure of the quality o…
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It is this one: http://pcl.missouri.edu/sites/default/files/Rouder.etal_.pbr_.2016.pdf Do you have a reference for the Steyer paper in return? :-) E.J.
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So Quentin kindly looked into the R code for the BayesFactor package. It seems that the following function is used to calculate the error for the cases where the package does not use the integrate function (obtained from https://github.com/richarddm…
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Yes, I recall a few papers critiquing Type III sums of squares because of issues with differences due to scale transformations. And there's also a new paper out by Rouder, Morey and colleagues (in PBR) about model-based ANOVA approaches.
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Great question. Let's ask Richard. Richard, can you explain how this is computed exactly? We will also mention this in our new paper on JASP which will be on my website soon. Cheers, E.J.
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Hi jjth, I'm not sure why there isn't an error %. JASP calls the BayesFactor package. Of course the error is very small, but that shouldn't be an issue. What do you mean when you say "what is the correct statement for this question?" -- …
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Also, for the benefit of others in this forum, can you link to those slides from Richard? Cheers, E.J.
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Well, we'd have to solicit comments from Richard I guess! Cheers, E.J.
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Hi Martin, I don't see anything in the derivation that would cause this to be a problem. But Richard knows the Bayesian ANOVA inside and out, so I hope he can confirm. Cheers, E.J.
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Hi Dion, I can't see the file -- maybe I'm looking in the wrong spot. You can Email it to me directly, or put it on the OSF and send the link. Cheers, E.J.
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Ah, I wish all questions were that easy to answer :-)
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Hi Szabolcs, We will soon include the Vovk-Sellke maximum ratio in JASP. I think this is a pretty general rule, but I am not sure whether it applies after you do multiple comparisons. This sort of depends on how you deal with multiple comparisons i…
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Hi Pieter, The answers: 1. "HOW IS H0 SPECIFIED?" H0 is the single point delta=0. So there is no spread. H0 states that the effect is completely and utterly absent. * "Am I correct in that H1 is the positive portion of the Cauchy …
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Dear A, Yes, I think that's spot-on. I would report the results you mention, and I would also put an annotated .jasp file on the Open Science Framework. If you provide the link then everybody can view the output even without having JASP installed. C…
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Hi Dion, Can you give us some more detail regarding the hypothesis? And maybe you can add a .jasp file or some output table? (if you aren't ready to share your results with the world just create fake labels and/or use half of the data set). Cheers, …
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Hi Tali, I think this is a modeling issue that surpasses the distinction between the statistical paradigms. Suppose facilitation and inference are perfectly correlated, so that people who have large facilitatory effects also have large interference …
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Thanks Pieter. Richard wrote a nice paper on confidence intervals (now that you mention them :-)): https://learnbayes.org/papers/confidenceIntervalsFallacy/ Cheers, E.J.
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Hi Ksryan, The current version of JASP does not do the Kruskal Wallis test. Neither does it have MANOVA. Obviously these things are high on our to-do list (the Kruskal Wallis test higher than the MANOVA). Cheers, E.J.
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Hi Papi, In the case of your design, the columns are the procedures you compare (so these are fixed) and the rows contain the performance (so that is not fixed). So basically, you are right, and in your 2x2 case the test reduces to a test for two p…
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Hi JenC, I'm now writing a paper that explains the output. It will be done in a week or two, and as soon as that's accomplished I'll put it on my website. I have commented on similar questions before, so if you search this forum for "ANOVA&quo…
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Hi Will, It's not ready for prime time (or any time, really). Right now I've only covered the binomial test. But very soon I'll add t-tests, correlation, and ANOVA. At that point I will distribute the manual. But I want to do this right so it will …
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Hi FatCharlie, Yes, in the sequential analysis the Bayes Factor is plotted as each participant is added to the data set, in the order of the rows. Currently you cannot extract the exact data points. You may add a feature request to GitHub if you li…
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OK, I'll forward this to our stepwise regression expert :-)
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Sorry for the tardy response! Do you mean that "group" seems unlikely, even though there is a lot of evidence to prefer it over the null? This is because the BF_10 column compares each model against the null, whereas the P(M|data) column t…
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hi Jannik, Can you send along a .jasp file or some screenshots so we can reproduce this? Cheers, E.J.
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I'll pass this on to the team. E.J.
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I am writing a tutorial paper on how to interpret these Bayesian ANOVAs. In the meantime, this is the go-to paper: http://www.ejwagenmakers.com/inpress/RouderEtAlinpressANOVAPM.pdf
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Hi Tobi, It still would not matter. The BF gives you a continuous measure of evidence. The thresholds are arbitrary conventions. Useful for quick interpretation but one should never lose sight of the underlying continuous values. in other words, God…
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That discrepancy is subtle. You would draw the same qualitative conclusion in either case. In my opinion, a BF of 2.2 is seriously different from a BF of about 8. As far as the different models go, often there is no better or worse -- the only thing…