English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Categorical Perception of Male and Female Faces and the Single-Route Hypothesis

Armann, R., & Bülthoff, I. (2008). Categorical Perception of Male and Female Faces and the Single-Route Hypothesis. In 9th Conference of the Junior Neuroscientists of Tübingen (NeNa 2008) (pp. 13).

Item is

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Armann, R1, 2, Author           
Bülthoff, I1, 2, Author           
Affiliations:
1Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

Content

show
hide
Free keywords: -
 Abstract: The cognitive process of categorizing perceptually similar stimuli into qualitatively different categories is fundamental to any systematic acting upon the world, as it helps to
reduce the immense number of entities to more manageable fragments and spares us from
learning anew each time we encounter an unknown individual. Categories are evident
in all sensory modalities and range from relatively simple (e. g., color perception) to the
most abstract human concepts, as for example faces. Categorical perception (CP) has
been shown for face identity (e. g., Beale Keil 1995), ethnicity (Levin Beale, 2000),
and facial expression (Calder et al., 1996). Astonishingly, for sex, a natural facial characteristic
consisting of only two biologically relevant categories, con
icting results have
been reported so far. CP for sex has been shown (Campanella et al., 2001) when sex
information was varied linearly (by morphing) between male and female face identities,
thus intermixing identity and sex information. When sex continua were created based on
single face identities (Bultho and Newell, 2004), no CP for sex was found in nave participants.
So the question remained open whether or not there is CP for the perception of
sex as a facial dimension or if processing of the sex of a face is directly linked to processing
of the face's identity, as proposed by the "`single-route hypothesis"' (e. g., by Rossion,
2002, Ganel Goshen Gottstein, 2002; Bultho Newell, 2004). To overcome one potential
constraint of earlier studies, i. e., 'asymmetric' sex morph continua, we performed
extensive ratings of faces and sex morphs from our face database, to create 'controlled'
male and female faces with similar perceived degrees of 'maleness' and 'femaleness'. We
then examined CP of sex for these faces with classical discrimination and classication
experiments. Critically, we manipulated the degree of familiarization of the faces prior to
testing, as follows. Observers were either nave, or familiarized with the average male and
female face of all faces, or the endpoint identities of the morph continua, or with other
male and female faces with the same perceived degree of maleness and femaleness than
the test faces. Our results conrm the lack of naturally occurring CP for sex and provide
more evidence for the linked processing of sex and identity, as participants showed clear
CP only after familiarization with the test face identities.

Details

show
hide
Language(s):
 Dates: 2008-10
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: BibTex Citekey: ArmannB2008
 Degree: -

Event

show
hide
Title: 9th Conference of the Junior Neuroscientists of Tübingen (NeNa 2008)
Place of Event: Ellwangen, Germany
Start-/End Date: 2008-10-27 - 2008-10-29

Legal Case

show

Project information

show

Source 1

show
hide
Title: 9th Conference of the Junior Neuroscientists of Tübingen (NeNa 2008)
Source Genre: Proceedings
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 13 Identifier: -