Max-Planck-Institut für Informatik
max planck institut
informatik
mpii logo Minerva of the Max Planck Society
 

MPI-INF or MPI-SWS or Local Campus Event Calendar

<< Previous Entry Next Entry >> New Event Entry Edit this Entry Login to DB (to update, delete)
What and Who
Title:Weighting of information across eye movements
Speaker:Alexander Schütz
coming from:Allgemeine und Biologische Psychologie, Philipps-Universität Marburg
Speakers Bio:Alexander Schütz studied Psychology at the Friedrich-Alexander-University Erlangen-Nürnberg and finished his studies with a thesis at AUDI AG, supervised by Cristina Meinecke. In 2006 he moved to Karl Gegenfurtner’s lab at the Justus-Liebig-University Gießen, where he was working first as PhD student, from 2008 as post-doc and from 2010 as assistant professor. In between he was a visiting researcher at Dirk Kerzel’s lab in Geneva and at Concetta Morrone’s and David Burr’s lab in Pisa. Since 2015 Alexander Schütz is professor at the Philipps-University Marburg. Alexander Schütz is studying the interaction of visual perception and different types of eye movements, using eye tracking, visual psychophysics and computational modeling. His research is funded by the German Research Foundation and an ERC Starting Grant.
Event Type:Talk
Visibility:D1, D2, D3, D4, D5, SWS, RG1, MMCI
We use this to send out email in the morning.
Level:Public Audience
Language:English
Date, Time and Location
Date:Tuesday, 14 June 2016
Time:14:00
Duration:60 Minutes
Location:Saarbrücken
Building:E1 4
Room:024
Abstract
Due to the inhomogeneous visual representation across the visual field, humans use peripheral vision to select objects of interest and foveate them by saccadic eye movements for further scrutiny. Thus, we typically gather information about an object from peripheral vision before and foveal vision after a saccade. In three projects we investigated how peripheral and foveal information is weighted across saccades.

First, we studied how peripheral information before a saccade is integrated with foveal information after a saccade. By manipulating the relative reliability and the consistency of peripheral and foveal information, we could show that peripheral and foveal information is weighted according to their reliability and integrated in a near-optimal manner. Second, we tested if the potential gain in information by executing a saccade modulates the latency of the saccade. We hypothesized that saccades which lead to a gain in information (i.e. when peripheral information is inferior to foveal information) should be executed at shorter latencies than saccades which lead to a loss of information (i.e when peripheral information is superior to foveal information). However, saccade latencies were not modulated by the gain or loss of information and only showed a robust facilitation when the eye movement target was relevant to a perceptual task.
These results suggest that the visual system weights and integrates peripheral and foveal information in a statistically optimal way, but these optimal weights seem not to be available for the control of eye movements.

Contact
Name(s):Andreas Bulling
Phone:0681 9325 2128
Video Broadcast
Video Broadcast:NoTo Location:
Tags, Category, Keywords and additional notes
Note:
Attachments, File(s):

Created by:Connie Balzert/MPI-INF, 03/18/2016 10:04 AMLast modified by:Uwe Brahm/MPII/DE, 11/24/2016 04:13 PM
  • Uwe Brahm, 04/06/2016 04:12 PM
  • Connie Balzert, 03/18/2016 10:04 AM -- Created document.