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
Investigating internal representations through spatiotemporal motor extrapolation
Monday, February 18, 2008, 01:00pm - 02:00pm
New York University , Department of Psychology
In recent work we showed that observers� estimates of the location and orientation of occluded contours are not always consistent with one another (Fulvio, Singh, & Maloney, 2008). This �dissociation� in visual processing of occluded contours is reminiscent of dissociations between perception and action claimed by Milner & Goodale (1998). I will present a study that extends previous perceptual work (Singh & Fulvio, 2005) to the motor domain. Subjects make speeded reaches, recorded by an Optotrak motion tracking device, to intersect a moving dot along its extrapolated trajectory with their fingertip. The extrapolated dot trajectories vary as a function of curvature, speed, and extrapolated distance. I will discuss the subjects� success in terms of these variables. I will also describe the kinematics of the movements and what they reveal about the underlying representations guiding them. Finally, I will relate the results back to the previous perceptual work to compare the role of task�perception versus action�and goal�perceptually complete versus reach the dot for a reward�on the nature of the extrapolated trajectories.
background reading: Goodale & Haffenden, 1997