Videos footage from RuCCS Colloquium Talks can be found on the RuCCS YouTube Channel. For all other events, please check the sponsor's website for more detail.
To filter by event category, click on the event category link in the table below or use the menu on the right.
List of Past Events
Optimality and Probabilistic Computation in Visual Categorization
Dr. Wei Ji Ma
From Monday, February 17, 2014 - 11:00am
To Sunday, February 16, 2014 - 12:00am
New York University, Department of Psychology and Center for Neural Science
In models of perception under uncertainty, the terms “optimal” and “probabilistic” are often used interchangeably. I will argue that they have distinct meanings and are associated with different experimental designs. I will then present two recent studies: a) a complex visual search task with simple stimuli, in which optimality, not simplicity seems to govern behavior; b) a visual categorization task under ambiguity, in which human and monkey behavior is probabilistic, but not necessarily optimal. In the latter task, I also show how the computation can be implemented by a plausible neural network, using a coding scheme known as probabilistic population coding. Finally, I will discuss V1 population recordings from monkeys performing this task.