Biased evidence assimilation under bounded Bayesian rationality


Brendan O'Connor
M.S. Thesis, Symbolic Systems
Readers: Jonathan Bendor and James McClelland
September 2006

Abstract

I explain evidence assimilation bias as the result of agents trying to maintain cognitive consistency. This can be interpreted as a boundedly rational inference method -- local search for a maximally likely world model. Given a sufficiently complex network of beliefs, such an approximate Bayesian can display systematically non-Bayesian behavior. These arguments are first sketched via connectionist Hopfield networks, in line with previous psychology literature, and then illustrated and analyzed in more detail with probabilistic graphical models -- Bayesian networks and Markov random fields.

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