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vision series:Spring 2008 CREATED:20151203T141541 SUMMARY: Investigating internal representations through spatiotemporal motor extrapolation LOCATION:New York University \, Department of Psychology DESCRIPTION:
In recent work we showed that observers� estimates of the location and orientation of occluded contours a re not always consistent with one another (Fulvio, Singh, & Maloney, 20 08). This �dissociation� in visual processing of occluded contours is remin iscent of dissociations between perception and action claimed by Milner &am p; 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 mov ing dot along its extrapolated trajectory with their fingertip. The extrapo lated dot trajectories vary as a function of curvature, speed, and extrapol ated distance. I will discuss the subjects� success in terms of these varia bles. I will also describe the kinematics of the movements and what they re veal about the underlying representations guiding them. Finally, I will rel ate 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. < SPAN style="mso-spacerun: yes">
background reading: Goodale & Haffenden, 1997
CONTACT:Jacqueline Fulvio X-EXTRAINFO:Jacqueline Fulvio (http://homepages.nyu.edu/~jmf384) DTSTAMP:20240329T044911 DTSTART;TZID=America/New_York:20080218T130000 DTEND;TZID=America/New_York:20080218T140000 SEQUENCE:0 TRANSP:OPAQUE END:VEVENT END:VCALENDAR