Shravan Vasishth's Slog (Statistics blog)

Barr et al's well-intentioned paper is starting to lead to some seriously weird behavior in psycholinguistics! As a reviewer, I'm se...

These researchers did a small between-patient study with low power to compare people on 24 hours of dialysis vs 12 hours of dialysis a week....

I wanted to post this reply to John Kruschke's blog post , but the blog comment box does not allow such a long response, so I posted it ...

Recently, Barr et al published a paper in the Journal of Memory and Language , arguing that we should fit maximal linear mixed models, i.e.,...

Following a discussion on Gelman's blog, I was playing around with simulating scientists looking for significant effects. Suppose each o...

Distribution of intercept-slope correlation estimates with 37 subjects, 15 items Distribution of intercept-slope correlation estimate...

Here is a comparison of lmer vs Stan output on a mildly complicated dataset from a psychology expt. (Kliegl et al 2011). The data are here: ...

As part of my course in bayesian data analysis , I have put up some common linear mixed models that we fit in psycholinguistics. These are w...

I decided to teach a basic course on bayesian data analysis with a focus on psycholinguistics. Here is the course website (below). How coul...

In linear mixed models, we fit models like these (the Ware-Laird formulation--see Pinheiro and Bates 2000, for example): \begin{equatio...

Ever wondered what those correlations are in a linear mixed model? For example: The estimated correlation between $\hat{\beta}_1$ an...

As part of my long slog towards statistical understanding, I started making notes on the very specific topic of linear models. The details a...

" In Cauchy's day, when life was simple and matrices were small, determinants played a major role in analytic geometry and other p...

Recently seen quote on Gelman's blog: “No scientific worker has a fixed level of significance at which from year to year, and in all c...

In the statistics course I'm doing, the solutions to assignments have R code, but the instructor doesn't want to see them in the mai...

Recently, on Andrew Gelman's blog there was a discussion about how to get yourself a statistics education (presumably without going thr...

I've been listing my reviewing service as an enumerated list in my cv till now, but recently I saw a better option: Brian Roark's cv...

I finally have a sabbatical; such a relief not to have to teach for a bit. What can one usefully do during a sabbatical? Here's a prelim...

"But an isolated finding, especially when embodied in a 2 X 2 design, at the .05 level or even the .01 level was frequently judged no...

Here's a revolutionary website: all data and code accompanying papers. http://read.psych.uni-potsdam.de/pmr2/ Imagine if it was mand...