EJ
About
- Username
- EJ
- Joined
- Visits
- 2,532
- Last Active
- Roles
- Member, Administrator, Moderator
Comments
-
Hi Tobi, OK. Here's what's going on: (1) In a between-subjects design, the Bayesian t-test (with default priors) gives the same result as the Bayesian ANOVA (with default priors). (2) In between-subject designs and in within-subject designs, the cl…
-
Are you doing your t-test on the difference in scores? Is this case there can be a discrepancy. But if you do your t-test on the two columns of data, the results should be the same (under the default prior in ANOVA and t-test)....Hmmm I'll look into…
-
I would be highly surprised if --with 20k datapoints-- the non-normality affects the qualitative conclusions. What you can do to check is transform the data to (approximate) normality and carry out the test on the transformed data. With 20k particip…
-
Oh, no, the degree of robustness has not been verified. But both classical and Bayesian tests rely on the same basic features of the data, so it stands to reason that they will be similarly affected. Cheers, E.J.
-
Hi ssk, The best way to understand what the width parameter does is to try a few values and inspect the prior-posterior plot. In the current version of JASP, all Cauchy priors are centered on 0, so the median is 0 (the distribution does not have a …
-
Hi MiraSo, * Right now JASP does not do data editing. So you'll have to first exclude your subjects in Excel, R, Word, or whatever data editing program you use, and afterwards use JASP. Not ideal, and we are working to include editing functionality…
-
Hi AnneG, There is a lot of information here. In JASP, are you trying to test the Main * Orient interaction? In that case, the relevant output is: Main + Orient 0.200 0.038 0.158 0.060 2.344 Main + Orient + Main ✻ Orient 0.200 0.014 0.058 0.023…
-
Hi duplex, If you ask for the R code on the JASP GitHub page then one of our programmers can send you the code. The code is of course also available on GitHub, but you might have to do some digging. In addition, see http://shinyapps.org/apps/RGraph…
-
Hi C_B_Prof, Check out the "Descriptives" -- first tab on the ribbon. JASP does not do data-editing yet, but it's in the works. Cheers, E.J.
-
Yes and yes. Also, we are working to include nonparametric Bayesian tests. Cheers, E.J.
-
Ah yes. Well that requires a separate development. You could plot the two posteriors and eyeball them, but that is not a real test. We have it on our radar but it will take some time to get done. E.J.
-
Hi Ether, Really, this is not a problem. We do not make any of these changes. However, if you want to discuss this with our programming team, you can create an issue on GitHub (see the link on https://jasp-stats.org/feature-requests/). You have to …
-
First, Richard Morey and Jeff Rouder have a paper on BF meta-analyses (2011 in PBR, a response to Bem). Second, are you interested in a BF for the difference in correlations? E.J.
-
Thanks, I'll pass this on. EJ.
-
Hi Ether, You are not supposed to peek inside the exe! :-) To clarify: JASP uses R (and specific R packages) under the hood, so we need to bundle it together with the GUI routines. The JASP installation happens in a way so that it does not interfer…
-
Either that, or refer to the default and cite the BayesFactor package documentation for details. E.J.
-
If you've got a variable "time" ("1", "2", "3", say) and you pick split by "time", then it should work. But it is difficult to convey these things without the benefit of a drawing, so maybe I misunde…
-
Hi Sarah, The box plot is a recent addition and we are still working out ways to extend it. That error message sounds like it might be a bug though (different numbers of response should not be a problem) -- can you report it on the JASP GitHub page…
-
When you set the "samples" function to manual and you increase the default number (which is what "auto" does -- I guess we could have called it "default") then you can decrease the %error in the estimation of your BFs. …
-
Hi Daniel, Yes, that is correct: for the BF and the posterior distribution, r and N alone are sufficient. See http://arxiv.org/abs/1510.01188 for details. As far as the quantitative meta-analysis is concerned, I'd prefer to see all of the BFs; usi…
-
It appears to me as if you wish to do a comparison of two multinomials. There is one multinomial per group, and each multinomial has the disease categories. So it looks as if you need the contingency table functionality. Cheers, E.J.
-
You can send it to jasp.stats@gmail.com
-
My solution is to give the variables really short names :-) I'll pass this on to the programmers. E.J.
-
Hi MSB, The model formulation is different. The regression model is based on the Jeffreys-Zellner-Siow framework, and the correlation model is based on the initial proposal by Jeffreys. The paper by Ruud Wetzels presents a correlation in line with …
-
Hi Rex, This is weird. JASP uses standard procedures to guess the measurement level. Can you send the offending csv file? E.J.
-
Maybe an upside-down cross?
-
Hi Sanne, We use code from R packages, and most of the time SPSS is wrong and R is right, but who knows, this may be an exception. Can you provide more specifics so we can look into it? Cheers, E.J.
-
Interesting stuff! (and yes I did mean to hint at the fatter tails). Cheers, E.J.
-
Hi RA, I am working on a JASP manual, and on a JASP article that describes how to interpret the JASP output for ANOVA designs. You can also check out the ANOVA paper on my website, http://www.ejwagenmakers.com/inpress/RouderEtAlinpressANOVAPM.pdf …
-
We are about to submit the revision. We will post the paper as soon as it's accepted. Cheers, E.J.