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Event segmentation in a visual language: neural bases of processing American Sign Language predicates
Evie Malaia1, Ruwan Ranaweera, Ronnie B Wilbur
1University of Texas, Arlington, TX, USA. malaia@uta.edu
Neuroimage
|October 29, 2011
Summary
American Sign Language (ASL) signers process verb signs differently based on their endpoint. This study suggests that visual cues used for event segmentation may become abstract linguistic features through ASL exposure.
Area of Science:
- Neuroscience
- Linguistics
- Cognitive Science
Background:
- American Sign Language (ASL) signers use hand articulator motion to distinguish endpoints in telic verb signs.
- Non-signers are sensitive to velocity and deceleration cues for event segmentation in visual scenes.
- This raises questions about shared neural substrates between ASL verb processing and non-signers' event segmentation.
Purpose of the Study:
- To investigate the neural basis of predicate perception and linguistic processing in ASL.
- To explore whether perceptual-kinematic features for event segmentation are processed similarly in ASL signers and non-signers.
Main Methods:
- Utilized motion capture and neuroimaging techniques.
- Analyzed brain activation patterns in Deaf ASL signers during verb processing.
Main Results:
- Deaf ASL signers exhibit distinct neural processing for telic versus atelic verb signs.
- Telic verb signs were processed with higher phonological complexity compared to atelic verb signs.
- Observed activation patterns suggest a link between perceptual-kinematic features and abstract linguistic processing.
Conclusions:
- Sign language exposure can shape the processing of perceptual-kinematic features into abstract linguistic ones.
- Findings align with neuroimaging data from spoken and sign languages, highlighting shared neural mechanisms.
- This research sheds light on the neural plasticity involved in acquiring sign language.
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