Learning-based and behavioural evidence for probabilistic perception in the cortex

Seminar | March 2 | 12-1 p.m. | 560 Evans Hall

 Jozsef Fiser, Central European University

 Neuroscience Institute, Helen Wills

560 Evans
The notion of interpreting cortical operations as probabilistic computation has been steadily gaining ground in neuroscience, and with the emergence of the PPC-based and sampling-based frameworks, now there exist clear theoretical alternatives of how such computation might happen in the brain. Nevertheless, a number of crucial issues necessary to make these frameworks biologically viable proposals of how the brain works remained unclear. I will focus on three such issues: providing a learning-based neurophysiological support of the probabilistic sampling framework, demonstrating a psychophysical hallmark of this framework, and finally, presenting behavioural evidence of optimal probabilistic computation at the lowest level of cortical visual processing.