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Chris Chatham is a postdoctoral researcher at Brown University.
January 31, 2008
[ Artificial Intelligence, Link Posts ]
Phil Stearns has constructed a 45 "neuron" network of electronic parts which responds to lights and tones with a (rather cute) squealing sound. A picture of the components for this strange device: Each "neuron" consisted of analog electronics corresponding to...
Posted by Chris Chatham at 11:05 AM • 9 Comments • 0 TrackBacks
January 19, 2008
[ Miscellaneous ]
UPDATE: Diebold effect explained? Marc has an excellent summary of a flurry of Diebold-related discussions between me, "T", Marc, and Sean. Sean also has a network model of the apparent Diebold effect. I think we'll soon hear from Brian Mingus...
Posted by Chris Chatham at 7:05 PM • 3 Comments • 0 TrackBacks
January 18, 2008
[ Miscellaneous ]
Update: Diebold Effect explained. Here's a unique approach to understanding the Diebold effect: S.Walker has dealt with a potential multicolinearity problem between predictors by taking the principal components of a variety of demographic variables. My brief rejoinder: the residuals of...
Posted by Chris Chatham at 1:03 AM • 8 Comments • 0 TrackBacks
January 17, 2008
[ Miscellaneous ]
Update: Diebold effect explained. Jon Stewart famously accused the Crossfire co-hosts as "hurting America" by imitating the style and appearance of political debate to disguise partisan hackery and vacuous strawman arguments. In the case of the recent NH primary, the...
Posted by Chris Chatham at 11:27 AM • 3 Comments • 0 TrackBacks
January 15, 2008
[ Miscellaneous ]
UPDATES: Diebold effect explained. (previous: 1, 2, 3, 4 5 6 (a nonlinear approach) 7) In contrast to exit pre-election polls, the final vote tally from the NH democratic primary shows a surprise victory for Hillary Clinton. People quickly noticed...
Posted by Chris Chatham at 5:42 PM • 80 Comments • 0 TrackBacks
January 11, 2008
[ 
, Artificial Intelligence, Cognitive Neuroscience, Computational Modeling ]
One of the bottlenecks in human memory capacity is its "filtering efficiency" - irrelevant information in memory only detracts from an already-constrained memory span. New work by McNab & Klingberg images the neural structure directly responsible for such filtering, and...
Posted by Chris Chatham at 2:09 PM • 2 Comments • 0 TrackBacks
[ Link Posts ]
Josh Hartshorne, coauthor of a the Hartshorne & Ullman study I've discussed before, has a new blog that's already filled with interesting posts. What is to blame for psychology's awful PR? Does workforce diversity improve productivity? Why languages can't be...
Posted by Chris Chatham at 12:51 PM • 1 Comments • 0 TrackBacks
January 10, 2008
[ , Cognitive Neuroscience, Developmental Psychology ]
A new educational system called "Tools of the Mind" teaches not facts and figures, but rather focuses on cognitive skills in structured play. In the largest and most compelling study yet, exposure to this curriculum in the classroom drastically improves...
Posted by Chris Chatham at 3:06 PM • 9 Comments • 0 TrackBacks
January 8, 2008
[ Link Posts ]
Mick Grierson has created a real-time EEG-based brain-computer interface for music synthesis. You can watch a video here. We've been designing experiments to test how classic ERPs (P300/600, N400, etc) may emerge from user interactions with this system, given previous...
Posted by Chris Chatham at 1:44 PM • 3 Comments • 0 TrackBacks
January 7, 2008
[ , Cognitive Neuroscience ]
A continuing challenge in cognitive neuroscience is determining which neural structures are actually responsible for certain thoughts and behaviors. For example, fMRI and other neuroimaging techniques cannot tell us if a certain region of visual cortex is necessary for perceiving...
Posted by Chris Chatham at 12:01 PM • 0 Comments • 0 TrackBacks
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