Blog Archives

How to report a Bayesian analysis: Teaching why

May 9, 2012
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How to report a Bayesian analysis: Teaching why

An interesting recent article emphasized that asking students to generate what should be reported from a Bayesian analysis also gets them to think about why things need to be reported, which in turn can get students to understand better how Bayesian an...

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Workshop in Chicago, May 24

April 24, 2012
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Workshop in Chicago, May 24

I'll be doing a workshop at the meeting of the Association for Psychological Science in Chicago, Thursday May 24. Details can be found here.(I'm also doing a workshop in Chicago on May 4; details here.)A list of future and past workshops can be found h...

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Improved Programs for Hierarchical Bayesian ANOVA

April 18, 2012
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Improved Programs for Hierarchical Bayesian ANOVA

I've made three important changes in the programs for hierarchical Bayesian ANOVA. First, I changed the hyperprior on the variance (standard deviation) parameters. I was never pleased with the "+.1" kludge that I used in the book, explained on p. 496: ...

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Why to use highest density intervals instead of equal tailed intervals

April 16, 2012
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Why to use highest density intervals instead of equal tailed intervals

I recently received this question in an e-mail:We've obtained a dataset that reports hospital rates of hospital-acquired bed sores (as % of patients, based on hospital-wide patient exams 4 days per year), and they also provide CI's for these point esti...

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Compilation of JAGS resources

April 13, 2012
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Compilation of JAGS resources

Jeremy Anglim has posted a very nice summary of resources for JAGS and examples of Bayesian analyses. Do give it a look!

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Negative Binomial Reparameterization

April 7, 2012
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Negative Binomial Reparameterization

In a previous post, I showed that direct estimation of the p and r parameters in a negative binomial distribution could involve bad autocorrelation in the MCMC chains, and I suggested that there must be some standard reparameterization to solve the pro...

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Some videos about the history of Bayes’ rule

April 3, 2012
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Some videos about the history of Bayes’ rule

Some videos about the history of Bayes' rule. Update: Be sure to read the comment from Sharon McGrayne (click the comments link at the end of the post).One by Sharon Bertsch McGrayne (32 min.):One by Bill Bryson (5 min.):Update: Be sure to expand the c...

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Workshop in Chicago, May 4

April 3, 2012
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Workshop in Chicago, May 4

I'll be doing a workshop at the meeting of the Midwestern Psychological Association in Chicago, Friday May 4. Details can be found here.A list of future and past workshops can be found here.

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Negative Binomial for Count Data

March 31, 2012
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Negative Binomial for Count Data

I have noticed that when estimating the parameters of a negative binomial distribution for describing count data, the MCMC chain can become extremely autocorrelated because the parameters are highly correlated. Question: There must be some standard re-...

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Classroom-based review in J. of Math. Psych.

March 22, 2012
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Classroom-based review in J. of Math. Psych.

In a recent review (full citation below) in the Journal of Mathematical Psychology, Wolf Vanpaemel and Francis Tuerlinckx report results from using the book in a classroom setting. They sayOverall, Kruschke is to be applauded for his incredible efforts...

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