EJ
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- EJ
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Hello GoldenRetriever, This is more of a question for the JASP GitHub page, I think. However, I will forward it to the team. My guess is that JASP saves all of the MCMC samples -- these are needed to plot the figures. It does seem wasteful to retain…
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Hi ABC_95, Basically, "yes, this is correct" to all of the above. For the ANOVA table you might want to put the best model on top, as this usually makes the output easier to interpret. Cheers, E.J.
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Hello Ajustudillo, The posterior model probability is slightly higher for the model that includes the interaction (0.532) than it is for the model that only has the main effects (0.420). So a smidgen of evidence for the interaction, is what I conclu…
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Hi cjm, The forum does not seem to take the .jasp files. Feel free to email me the files. I would need more handholding though -- in your figure: (1) what is the DV, exactly? (2) the points are averages? (3) the pattern across time is measured for…
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Hi Carolien, Yes, this is not trivial. In general one could use the sequential procedure outlined in this paper: Ly, A., Etz, A., Marsman, M., & Wagenmakers, E.-J. (2019). Replication Bayes factors from evidence updating. Behavior Research Metho…
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Hi Marie-Laure, It seems the error message says that the IT (impact?) variable needs to be either binary or continuous, but it is ordinal? Changing the scale to continuous may make the analysis run (not a perfect solution of course!). I am wondering…
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We have revamped this functionality, and therefore it was temporarily removed. The next version of JASP should include a substantial upgrade. Cheers, E.J.
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Hi Julius, It seems suboptimal to prevent the entire analysis only because the "if-item-dropped" subanalysis won't work. Why not allow the standard analysis for the 2 variable case and provide an error message whenever the "if item dr…
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Hi Sodosopa, There are multiple issues here, let's tackle them one at a time. First off: yes, reliability moved from under descriptives and is now its own module. Am I correct to think that you found the module, but you can no longer run Cronbach's …
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I think this is more of an issue for our GitHub page, as the JASP programming team will have to help you out on this one... E.J.
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Dear Zhenzhen, First off, the p=.056 vs BF10 = 2.848 result is pretty much as expected. The anomaly is the p=.008 vs BF10 = 1.977 outcome. What models did you compare exactly, to get at the interaction BF? Also, is this a repeated-measures ANOVA? We…
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We use the method as implemented in the BayesFactor R package, which is based on the JZS prior. If you go to the help file (press the blue circle with the "i" in the input panel) you'll find the references at the end. Key is this one: Roud…
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Hi Mary, SPSS appears to be using the BIC approximation. This often works well, but what we (JASP and BayesFactor) are trying to do is a little more sophisticated and precise, or so we like to think. Cheers, E.J.
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This is a recent change in JASP. We had our reasons but people got really confused, so we're changing it back. See our GitHub page for a discussion. Cheers, E.J.
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Hi Jaiden Michael and I used to do an annual workshop that provided the ideal opportunity for the kind of feedback you seek. Unfortunately the last one was cancelled due to corona, and the status of the 2021 rendition (usually in August) is still ve…
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I've downloaded the csv but I am unclear about what analysis fails -- what is the DV and what are the predictors? Can you email me the .jasp file? Judging from the error message, you probably have too few observations in one of your design cells to …
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Hi alg, I'll pass this on to our experts but I'll note that the mixed models do not (yet) come equipped with Bayes factors, and this means that there is presently no way to quantify the degree to which the data support or undercut the null. Informal…
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Hi Andre, This is in fact a very good question. Previously we did allow factors to be entered as predictors, but they weren't correctly coded as factors. In the upcoming version we have separate input boxes for continuous covariates and factors. If …
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Hi Laura, JASP uses lavaan code, so it would just be a matter of writing the required lavaan syntax and pasting that into the SEM window. Cheers, E.J.
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Hi Ravi, A covariate is something continuous, like GDP; a factor refers to a discrete category, like country. Sometimes there are no covariates or factors of interest, so it is purely optional. Most people would recommend a random effects model; how…
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That's strange. I'll notify the team, but this is really more appropriate for our GitHub page (https://jasp-stats.org/2018/03/29/request-feature-report-bug-jasp/) E.J.
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Hi Emma, Some general remarks: Missing data is not a problem for the Bayesian model (at least not in principle) You probably want to use a crossed-random effects model instead of ANOVA? In this case you should use our mixed model functionality (unfo…
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In order to help I think it would be good to see some more background -- maybe a screenshot of the data, and a more precise description of what it means for JASP "not to like zero's". It is also not clear to me why you would model this as …
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I don't see why it would be problematic to add interaction terms. JASP uses lavaan, so I recommend you consult the lavaan documentation (or Google the right key words). E.J.
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When you have activated the mediation analysis in JASP and you click on the blue "i", the help file will appear. At the end of that file, there are two papers referenced. The most conceptual one seems to be this: Jeremy C. Biesanz, Carl F.…
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Hi Mariamr, Yes, I think that two separate ANOVAs are an acceptable alternative solution. Cheers, E.J.
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A BF is like the scales of Lady Justice -- when one scale goes up the other one must go down; they are in a one-to-one correspondence. So if you have BF10 = 5 the data are 5 times more likely under H1 than under H0, and this is evidence for H1. This…
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You could generate a column with random binary numbers. Then you could use that to filter one subset or the other. E.J.
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Thanks for reporting this bug -- it would be great if you could post it on GitHub so the programmers can see it and take action! Cheers, E.J.
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Hi Markus, I'll ask the other team members, but I think it is cleanest if you create new columns or new files for each filter setting. Cheers, E.J.