Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!

Supported by

Default priors for Bayesian model comparison: Are they "ready-to-use" without further user input?

Dear all,

First off, thanks for your hard work! I really appreciate it.
after extensive searching I did not find a conclusive answer to my question, so here we go:

I am using the Bayesian Repeated-Measures in JASP 0.800 to test whether a model with or without an interaction is more likely given the data that I have. I am very happy with the results and would like to report them. However, I don't know what I should report with respect to the prior values being used.

It is important to mention that I don't want to make an informed guess about which hypothesis I myself deem more probable or about the effect sizes which I expect. Instead, I want the test to be as conservative as possible, explicitly assigning 50 % likelihood to both outcomes. My guess is that this is exactly what the default values in JASP are doing? I could not find a confirmation of this.

Jarosz & Wiley (2014) write "One issue that is often raised about Bayesian analyses is that they require a “prior”; that is, a prior probability distribution for the model parameters. Coming up with such an estimate can be problematic as it can require a certain amount of subjectivity and/or prior knowledge about the effect that is to be studied. However, a number of fairly objective priors have been developed, that make relatively few assumptions about the parameters."

TL;DR: When it comes to Bayesian Repeated-Measures ANOVAs, are the default values in JASP "fairly objective priors" that are ready-to-use? If not, how do I figure out which priors are appropriate?

I appreciate your comments!
Best wishes,


  • The ANOVA conceptualized as a hierarchical linear mixed model where levels are clustered within factors following the approach of Rouder, Morey, Verhagen, Swagman, and Wagenmakers (2016). Here, the effects are shrinkage estimators (Efron & Morris, 1977) expressed in the effect size d where each factor gets a shared prior for its levels. The dispersion of these priors g is estimated from the data by a scaled inverse chi-squared-distribution with a single degree of freedom. The larger you set r, the greater is the dispersion, i. e. large effects become (a priori) more likely while small effects lose. if you lower r (if you expect a small group difference), small effects get more mass, while larger ones lose.

  • Yes, the default settings are meant to serve as an "objective" specification that can be used across a wide range of different scenarios.


  • Thanks a lot for the fast responses!

    Best wishes,

Sign In or Register to comment.

agen judi bola , sportbook, casino, togel, number game, singapore, tangkas, basket, slot, poker, dominoqq, agen bola. Semua permainan bisa dimainkan hanya dengan 1 ID. minimal deposit 50.000 ,- bonus cashback hingga 10% , diskon togel hingga 66% bisa bermain di android dan IOS kapanpun dan dimana pun. poker , bandarq , aduq, domino qq , dominobet. Semua permainan bisa dimainkan hanya dengan 1 ID. minimal deposit 10.000 ,- bonus turnover 0.5% dan bonus referral 20%. Bonus - bonus yang dihadirkan bisa terbilang cukup tinggi dan memuaskan, anda hanya perlu memasang pada situs yang memberikan bursa pasaran terbaik yaitu Bola168. Situs penyedia segala jenis permainan poker online kini semakin banyak ditemukan di Internet, salah satunya TahunQQ merupakan situs Agen Judi Domino66 Dan BandarQ Terpercaya yang mampu memberikan banyak provit bagi bettornya. Permainan Yang Di Sediakan Dewi365 Juga sangat banyak Dan menarik dan Peluang untuk memenangkan Taruhan Judi online ini juga sangat mudah . Mainkan Segera Taruhan Sportbook anda bersama Agen Judi Bola Bersama Dewi365 Kemenangan Anda Berapa pun akan Terbayarkan. Tersedia 9 macam permainan seru yang bisa kamu mainkan hanya di dalam 1 ID saja. Permainan seru yang tersedia seperti Poker, Domino QQ Dan juga BandarQ Online. Semuanya tersedia lengkap hanya di ABGQQ. Situs ABGQQ sangat mudah dimenangkan, kamu juga akan mendapatkan mega bonus dan setiap pemain berhak mendapatkan cashback mingguan. ABGQQ juga telah diakui sebagai Bandar Domino Online yang menjamin sistem FAIR PLAY disetiap permainan yang bisa dimainkan dengan deposit minimal hanya Rp.25.000. DEWI365 adalah Bandar Judi Bola Terpercaya & resmi dan terpercaya di indonesia. Situs judi bola ini menyediakan fasilitas bagi anda untuk dapat bermain memainkan permainan judi bola. Didalam situs ini memiliki berbagai permainan taruhan bola terlengkap seperti Sbobet, yang membuat DEWI365 menjadi situs judi bola terbaik dan terpercaya di Indonesia. Tentunya sebagai situs yang bertugas sebagai Bandar Poker Online pastinya akan berusaha untuk menjaga semua informasi dan keamanan yang terdapat di POKERQQ13. Kotakqq adalah situs Judi Poker Online Terpercayayang menyediakan 9 jenis permainan sakong online, dominoqq, domino99, bandarq, bandar ceme, aduq, poker online, bandar poker, balak66, perang baccarat, dan capsa susun. Dengan minimal deposit withdraw 15.000 Anda sudah bisa memainkan semua permaina pkv games di situs kami. Jackpot besar,Win rate tinggi, Fair play, PKV Games