View Full Document

Retinotopy of the face aftereffect



View the full content.
View Full Document
View Full Document

6 views

Unformatted text preview:

Available online at www sciencedirect com Vision Research 48 2008 42 54 www elsevier com locate visres Retinotopy of the face aftere ect Seyed Reza Afraz a a Patrick Cavanagh a b Department of Psychology Harvard University 33 Kirkland Street Cambridge MA 02138 USA b Laboratoire Psychologie de la Perception Universite Paris Descartes Paris France Received 26 June 2007 received in revised form 5 October 2007 Abstract Physiological results for the size of face speci c units in inferotemporal cortex IT support an extraordinarily large range of possible sizes from 2 5 to 30 or more We use a behavioral test of face speci c aftere ects to measure the face analysis regions and nd a coarse retinotopy consistent with receptive elds of intermediate size 10 12 at 3 eccentricity In the rst experiment observers were adapted to a single face at 3 from xation A test a morph of the face and its anti face was then presented at di erent locations around xation and subjects classi ed it as face or anti face The face aftere ect FAE was not constant at all test locations it dropped to half its maximum value for tests 5 from the adapting location Simultaneous adaptation to both a face and its anti face placed at opposite locations across xation produced two separate regions of opposite aftere ects However with four stimuli faces alternating with anti faces equally spaced around xation the FAE was greatly reduced at all locations implying a fairly coarse localization of the aftere ect In the second experiment observers adapted to a face and its anti face presented either simultaneously or in alternation Results showed that the simultaneous presentation of a face and its anti face leads to stronger FAEs than sequential presentation suggesting that face processing has a dynamic nature and its region of analysis is sharpened when there is more than one face in the scene In the nal experiment a face and two anti face ankers with di erent spatial o sets were presented during adaptation and the



Access the best Study Guides, Lecture Notes and Practice Exams

Loading Unlocking...
Login

Join to view Retinotopy of the face aftereffect and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view Retinotopy of the face aftereffect and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?