Author: Bob C-J
I'm a teacher, researcher, and gadfly of neuroscience. My research interests are in the neural basis of learning and memory, the history of neuroscience, computational neuroscience, bibliometrics, and the philosophy of science. I teach courses in neuroscience, statistics, research methods, learning and memory, and happiness. In my spare time I'm usually tinkering with computers, writing programs, or playing ice hockey.

The Perils of MTurk, Part 1: Fuel to the Publication Bias Fire?

It’s not going to be a popular opinion, but I think MTurk has become a danger to sound psychological science.  This breaks my heart.  MTurk has helped transform my career for the better.  Moreover, MTurk participants are amazing: they are

We’ve Been Here Before: The Replication Crisis over the Pygmalion Effect

[UPDATE: Thanks to twitter I came across this marvelous book(Jussim, 2012) that does a great job explaining the Pygmalion effect, the controversy around it, and the overall state of research on expectancy effects.  I’ve amended parts of this post based on

Sample-size planning – a short video

Here’s a short talk I gave at the 2017 Society for Neuroscience meeting on sample size planning.  The talk discusses: Why you should plan your sample sizes in advance What not to do (how some common approaches can lead you

Why effect sizes? A tutorial (especially for Neuroscientists)

The New Statistics emphasizes effect sizes, confidence intervals, meta-analysis, and Open Science.  There’s a lot of momentum to adopt this change of focus.  For example, the APA recently released new guidelines for reporting quantitative research and throughout it emphasizes reporting

The complexity of measuring a ‘simple’ behavior (novelty preference tests seem terrible)

The replication crisis isn’t just about sample size and statistical inference.  Another key issue is measurement: the process of turning observations into quantitative statements about our sample.  It’s tricky.  In many cases we’ve run before we learned to walk, adopting methods

Pre-Print – The New Statistics for Better Science

We have a new preprint on how the New Statistics can save the world (sort of):  https://psyarxiv.com/3mztg  It’s for a special issue of the American Statistician on the them of  “Beyond p values”. We welcome your feedback on via email, twitter (@TheNewStats),

Not replicable, but citable

What happens to the reputation of a paper when the results reported cannot be replicated? Here’s a graph of citations/year from two studies–an original and a replication study that found little to no effect.  It’s just one example, but it

It’s not all bad news

Here’s a cool pre-print examining the quality of evidence in studies of the genetics of short-term memory in fruit flies (Tumkaya, Ott, & Claridge-Chang, 2018).  The paper conducts a meta-analysis of different genes that have been linked to altered olfactory

Pre-registration challenge met!

I (Bob) have met the pre-registration challenge!  I pre-registered a set of replication studies (Calin-Jageman, 2018), and now that they are published, I’ve received confirmation from the Center for Open Science that I have met the challenge–a check for $1,000

A bracing call for better science when linking genes to brain function

There’s a fantastic editorial out in the European Journal of Neuroscience (Mitchell, 2018) arguing that standards need to be much higher in the field of neurogenomics–that’s the study of how genes relate to differences in brain structure and function. The

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