the fifty percent sleeper

That’s the title of a short fiction piece I have up at lablit.com today; it’s about brain scanning and beef jerky, among other things. It starts like this: Day 1, 6 a.m. Ok, I’m locked into this place now. I’ve got ten pounds of beef jerky, fifty dollars for the vending machine, and a flash … Continue reading the fifty percent sleeper

specificity statistics for ROI analyses: a simple proposal

The brain is a big place. In the context of fMRI analysis, what that bigness means is that a typical 3D image of the brain might contain anywhere from 50,000 – 200,000 distinct voxels (3D pixels). Any of those voxels could theoretically show meaningful activation in relation to some contrast of interest, so the only … Continue reading specificity statistics for ROI analyses: a simple proposal

a well-written mainstream article on fMRI?!

Craig Bennett, of prefrontal.org and dead salmon fame, links to a really great Science News article on the promises and pitfalls of fMRI. As Bennett points out, the real gem of the article is the “quote of the week” from Nikos Logethetis (which I won’t spoil for you here; you’ll have to do just a … Continue reading a well-written mainstream article on fMRI?!

Ioannidis on effect size inflation, with guest appearance by Bozo the Clown

Andrew Gelman posted a link on his blog today to a paper by John Ioannidis I hadn’t seen before. In many respects, it’s basically the same paper I wrote earlier this year as a commentary on the Vul et al “voodoo correlations” paper (the commentary was itself based largely on an earlier chapter I wrote … Continue reading Ioannidis on effect size inflation, with guest appearance by Bozo the Clown