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Dissociation of the Confounding Influences of Expectancy and Integrative Difficulty Residing in Anomalous Sentences in Event-related Potential Studies
Published on: May 9, 2019
Electrophysiological evidence for two steps in syntactic analysis. Early automatic and late controlled processes
1Max-Plank-Institute of Cogniive Neuroscience, InselstraBe 22-26, D-04103 Leipzig, Germany. hahne@cns.mpg.de
This study on sentence structure analysis reveals that early brain responses (ELAN) to parsing errors are automatic. However, later brain responses (P600) depend on strategic control, indicating distinct processing stages.
Area of Science:
- Cognitive Neuroscience
- Psycholinguistics
- Neuroscience
Background:
- Event-related brain potential (ERP) measures, specifically early left anterior negativity (ELAN) and late positivity (P600), are linked to phrase structure violations in sentence processing.
- ELAN is hypothesized to reflect automatic first-pass parsing, while P600 is thought to reflect controlled second-pass parsing.
Purpose of the Study:
- To investigate the automaticity of first-pass parsing versus the controlled nature of second-pass parsing processes in sentence structural analysis.
- To test the hypothesis that first-pass parsing is automatic and second-pass parsing is controlled using ERP measures.
Main Methods:
- Examined event-related brain potential (ERP) measures during sentence structural analysis.
- Manipulated the proportion of grammatically correct versus incorrect sentences (20% or 80% violations).
- Analyzed the elicitation and distribution of early left anterior negativity (ELAN) and late positivity (P600) components.
Main Results:
- The early left anterior negativity (ELAN) was consistently elicited regardless of the violation proportion, supporting its automatic nature.
- The late positivity (P600) was only elicited when the proportion of incorrect sentences was low (20%), indicating strategic control.
Conclusions:
- First-pass sentence parsing processes, reflected by ELAN, operate automatically.
- Second-pass sentence parsing processes, reflected by P600, are subject to strategic control by the participant.
- ERP measures provide insights into the distinct automatic and controlled mechanisms underlying sentence comprehension.
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