For video footage from past you can visit the individual event pages, or go to our YouTube Channel

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

Beyond phenomenological connectedness: Functional consequences of filling-in during contour interpolation

Dr. Brian Keane

Monday, April 12, 2010, 12:00pm - 07:00pm

University of Medicine and Dentistry of New Jersey and Rutgers University

Copy to My Calendar (iCal) Download as iCal file
 

Contour interpolation is a perceptual process that builds phenomenologically salient contour representations from spatially segregated edges. Interpolation not only groups visible fragments together, it also fills-in or represents boundaries that fail to project to the eye. A recently-discovered consequence is that seemingly irrelevant information appearing near an interpolated path will affect the path interpolated. In this talk, I characterize interpolation by exploring how, why, and under what circumstances filling-in regions become influential. In the first part of the talk, I use a classification image (CI) technique to show that filling-in proceeds between fragments separated in space and time, and that filling-in itself might best be considered a spatiotemporal process. Next, I offer a novel interpretation of CIs deriving from shape discrimination paradigms, and suggest that prominent CI features correspond to previously undocumented interactions between contour forming and lightness induction mechanisms. I conclude by presenting data that show that, in at least some cases, filling-in cannot be easily altered via top-down strategy. This last finding bears on neural models of object perception, and also the debate as to whether perception is encapsulated from the effects of cognitive expectation.

Background Readings:

http://ruccs.rutgers.edu/tempdocs/Keane_etal_2007_VR.pdf

Dr. Brian Keane