Scanning strategies do not modulate face identification: eye-tracking and near-infrared spectroscopy study

During face identification in humans, facial information is sampled (seeing) and handled (processing) in ways that are influenced by the kind of facial image type, such as a self-image or an image of another face. However, the relationship between seeing and information processing is seldom consider...

Full description

Saved in:
Bibliographic Details
Published in:PloS one 2010-06, Vol.5 (6), p.e11050-e11050
Main Authors: Kita, Yosuke, Gunji, Atsuko, Sakihara, Kotoe, Inagaki, Masumi, Kaga, Makiko, Nakagawa, Eiji, Hosokawa, Toru
Format: Article
Language:English
Subjects:
Adult
Autism
Brain
Brain - physiology
Children & youth
Cognition & reasoning
Data processing
Eye
Eye Movements
Face
Female
Females
Fixation
Frontal gyrus
Frontal lobe
Hemodynamics
Humans
I.R. radiation
Identification
Information processing
Infrared spectra
Infrared spectroscopy
Infrared tracking
Male
Males
Medical imaging
Mental health
Morphing
Near infrared radiation
Near infrared spectroscopy
Neural networks
Neurology
Neuroscience/Behavioral Neuroscience
Neuroscience/Cognitive Neuroscience
Neuroscience/Experimental Psychology
Nose
Oxyhemoglobin
Pattern recognition
Psychiatry
Radiology and Medical Imaging/PET and SPECT Imaging
Scanning
Semantics
Social psychology
Spectroscopy
Spectroscopy, Near-Infrared
Spectrum analysis
Strategy
Studies
Teacher education
Visual Perception
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:During face identification in humans, facial information is sampled (seeing) and handled (processing) in ways that are influenced by the kind of facial image type, such as a self-image or an image of another face. However, the relationship between seeing and information processing is seldom considered. In this study, we aimed to reveal this relationship using simultaneous eye-tracking measurements and near-infrared spectroscopy (NIRS) in face identification tasks. 22 healthy adult subjects (8 males and 14 females) were shown facial morphing movies in which an initial facial image gradually changed into another facial image (that is, the subject's own face was changed to a familiar face). The fixation patterns on facial features were recorded, along with changes in oxyhemoglobin (oxyHb) levels in the frontal lobe, while the subjects identified several faces. In the self-face condition (self-face as the initial image), hemodynamic activity around the right inferior frontal gyrus (IFG) was significantly greater than in the familiar-face condition. On the other hand, the scanning strategy was similar in almost all conditions with more fixations on the eyes and nose than on other areas. Fixation time on the eye area did not correlate with changes in oxyHb levels, and none of the scanning strategy indices could estimate the hemodynamic changes. We conclude that hemodynamic activity, i.e., the means of processing facial information, is not always modulated by the face-scanning strategy, i.e., the way of seeing, and that the right IFG plays important roles in both self-other facial discrimination and self-evaluation.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0011050