Articles by Thom Baguley

Cronbach to the future

August 6, 2013 | Thom Baguley

One fascinating thing about working in the area of psychological statistics is how hard it is to move people away from reliance on bad, inefficient or otherwise problematic methods. My own view - informed to some extent by the literature, by experience and by anecdote is that it isn't sufficient ... [Read more...]

The stimuli-as-fixed-effect fallacy

June 21, 2012 | Thom Baguley

Neuroskeptic has just blogged on a new paper by Judd, Westfall and Kenny on Treating stimuli as a random factor in social psychology: A new and comprehensive solution to a pervasive but largely ignored problem. I can't access the original pap... [Read more...]

The aesthetics of error bars

May 27, 2012 | Thom Baguley

This blog and my other main blog (the companion blog for my book) are now syndicated via R-bloggers (posts tagged R only) and The latter is a relatively new blog aggregator but looks to have some interesting content. R-bloggers it quite... [Read more...]

Serious stats – free statistics resources

March 23, 2012 | Thom Baguley

The companion web site for Serious Stats is now live: web site includes:- a free sample chapter (Chapter 15: Contrasts)- data sets- R scripts- 5 online supplements (for meta-analysis, multiple imputation, r... [Read more...]

p curves revisited

March 15, 2012 | Thom Baguley

I finally found some time to take a closer look at p curves. I haven't had a chance to follow-up my simulations (and probably won't for a few weeks if not months), but I have had time to think through the ideas the p curve approach raises based on some ... [Read more...]

R code for p curves

March 14, 2012 | Thom Baguley

I have finally got around to posting the R code for my p curve simulation. Those familiar with R will realize how crude it is (I've been caught up with other urgent stuff and had no time to explore further).You are welcome to play with (and improve!) t... [Read more...]

Comparing correlations update

February 5, 2012 | Thom Baguley

I have just published R code for calculating CIs for differences between correlations on the Serious stats book blog. This covers independent correlations (taken from chapter 6 of the book) and dependent correlations (new R code written as a suppl... [Read more...]

Serious Stats book and blog update

February 2, 2012 | Thom Baguley

This is a quick update to announce my new blog Serious Stats. This is a companion to my forthcoming book of the same name:Baguley, T. (2012, in press). Serious stats: A guide to advanced statistics for the behavioral sciences. Basingstoke: Palgrav... [Read more...]

Introduction to using R in research

May 13, 2010 | Thom Baguley

I was recently asked to give a talk to our graduate school annual conference. I offered several titles and the one they picked was Using R in research. I'm not sure if this was a good idea or not. The graduate school covers PhD students across three ar... [Read more...]

Interaction plot from cell means

February 24, 2010 | Thom Baguley

I needed to produce a few a interaction plots for my book in R and, while the interaction.plot() function is useful it has a couple of drawbacks. First, the default output isn't very pretty. Second, it works from the raw data, whereas I often need plot... [Read more...]
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