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Nonlinear transduction of emotional facial expression
- Source :
- Vision research. 170
- Publication Year :
- 2019
-
Abstract
- To create neural representations of external stimuli, the brain performs a number of processing steps that transform its inputs. For fundamental attributes, such as stimulus contrast, this involves one or more nonlinearities that are believed to optimise the neural code to represent features of the natural environment. Here we ask if the same is also true of more complex stimulus dimensions, such as emotional facial expression. We report the results of three experiments combining morphed facial stimuli with electrophysiological and psychophysical methods to measure the function mapping emotional expression intensity to internal response. The results converge on a nonlinearity that accelerates over weak expressions, and then becomes compressive for stronger expressions, similar to the situation for lower level stimulus properties. We further demonstrate that the nonlinearity is not attributable to the morphing procedure used in stimulus generation.
- Subjects :
- PsyArXiv|Social and Behavioral Sciences|Perception|Vision
genetic structures
Computer science
Speech recognition
Emotions
bepress|Social and Behavioral Sciences|Psychology|Cognition and Perception
Stimulus (physiology)
050105 experimental psychology
bepress|Life Sciences|Neuroscience and Neurobiology
03 medical and health sciences
0302 clinical medicine
Psychophysics
Humans
0501 psychology and cognitive sciences
Emotional expression
bepress|Life Sciences|Neuroscience and Neurobiology|Cognitive Neuroscience
PsyArXiv|Social and Behavioral Sciences|Perception
05 social sciences
C830 Experimental Psychology
C800 Psychology
Sensory Systems
Facial Expression
PsyArXiv|Neuroscience|Cognitive Neuroscience
PsyArXiv|Social and Behavioral Sciences
Ophthalmology
Nonlinear system
Morphing
Electrophysiology
PsyArXiv|Neuroscience
Social Perception
Face
bepress|Social and Behavioral Sciences
PsyArXiv|Social and Behavioral Sciences|Perception|Picture Processing
Emotional facial expression
B140 Neuroscience
Neural coding
030217 neurology & neurosurgery
Subjects
Details
- ISSN :
- 18785646 and 00426989
- Volume :
- 170
- Database :
- OpenAIRE
- Journal :
- Vision research
- Accession number :
- edsair.doi.dedup.....928f5c2fa0b174d357035f859889df1a