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Chris Chatham is a postdoctoral researcher at Brown University.
July 27, 2010
[ Artificial Intelligence, Computational Modeling ]
"What we're seeking is not just one algorithm or one cool new trick - we're seeking a platform technology. In other words, we're not seeking the entirety of a collection of point solutions, what we're seeking is a platform technology...
Posted by Chris Chatham at 3:20 PM • 5 Comments • 0 TrackBacks
July 23, 2010
Decisions can be hard: the conflict you face in any decision can be increased if option A is not that much better than option B, or if option A is newly worse than option B. And then there are are...
Posted by Chris Chatham at 8:55 AM • 2 Comments • 0 TrackBacks
July 22, 2010
[ Artificial Intelligence, Cognitive Neuroscience, Computational Modeling ]
Recent work has leveraged increasingly sophisticated computational models of neural processing as a way of predicting the BOLD response on a trial-by-trial basis. The core idea behind much of this work is that reinforcement learning is a good model for...
Posted by Chris Chatham at 6:08 PM • 0 Comments • 0 TrackBacks
July 15, 2010
[ Link Posts ]
Swarming Quadrocopters? Nanomagnetic remote control of animal behavior. Blogs are data-mined for personality research. Vote for method of the year! (My vote is for induced pluripotency) If you think that the less competent you are, the more competent you think...
Posted by Chris Chatham at 9:21 AM • 0 Comments • 0 TrackBacks
July 14, 2010
[ Artificial Intelligence, Cognitive Neuroscience, Computational Modeling, Developmental Psychology ]
How can we enhance perception, learning, memory, and cognitive control? For this we need a rigorous integration of neurobiological development with cognitive change - that is, a computational developmental cognitive neuroscience.
Posted by Chris Chatham at 11:35 AM • 2 Comments • 0 TrackBacks
July 13, 2010
[ Cognitive Neuroscience, Developmental Psychology ]
There are statistics to keep in mind (voodoo, dead salmon, etc), but then there's psychological inference. And that's much trickier to do right.
Posted by Chris Chatham at 4:29 PM • 1 Comments • 0 TrackBacks
[ Cognitive Neuroscience, Developmental Psychology ]
Cohen et al pose a substantive challenge to the practice of neuroimaging: a convergent understanding of brain-behavior correlations might be thwarted by divergent results from univariate and multivariate methods.
Posted by Chris Chatham at 2:08 PM • 0 Comments • 0 TrackBacks
July 12, 2010
[ Artificial Intelligence, Cognitive Neuroscience, Computational Modeling ]
Thanks to an ingenious mistake, researchers functionally reverse the apparent organization of prefrontal cortex in a way predicted by theory.
Posted by Chris Chatham at 8:25 PM • 2 Comments • 0 TrackBacks
July 9, 2010
[ Artificial Intelligence, Cognitive Neuroscience, Computational Modeling ]
Difficulty-based explanations of hierarchical prefrontal recruitment are ruled-out in Badre et al's 2010 Neuron paper. They also highlight how a prefrontal circuit could support "parallel search" in discovering rules to govern behavior.
Posted by Chris Chatham at 3:11 PM • 4 Comments • 0 TrackBacks
[ Cognitive Neuroscience, Computational Modeling ]
One idea is that the brain might divvy up responsibility for tracking these goals & rewards between the hemispheres; but this simple division of labor smells like lots of ridiculous and outdated asymmetry theories. And that's why I'm dumbfounded.
Posted by Chris Chatham at 1:45 PM • 5 Comments • 0 TrackBacks
