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Factives at hand: When presupposition mode affects motor response.
Robert Reinecke1, Tatjana A Nazir2, Sarah Carvallo3
1Swiss Centre of Expertise in the Social Sciences (FORS).
Journal of Experimental Psychology. General
|February 14, 2022
Summary
Motor cortex activation during language processing is sensitive to information layering. Presupposed actions, unlike non-factually stated ones, trigger motor responses, suggesting distinct neural representations for background information.
Area of Science:
- Cognitive Neuroscience
- Psycholinguistics
- Motor Control
Background:
- Action-related language processing activates motor cortex areas.
- Linguistic presuppositions convey background information without explicit assertion.
- Neural representation of presupposed information remains unclear.
Purpose of the Study:
- Investigate how the brain represents presupposed information during language processing.
- Test linguistic theories on information layering using motor cortex sensitivity.
- Examine the impact of factive and nonfactive verb constructions on motor activity.
Main Methods:
- Utilized a grip-force sensor to measure motor brain activity during language tasks.
- Compared grip-force responses to asserted action verbs versus presupposed actions.
- Investigated effects of factive and nonfactive verb constructions, including negation.
Main Results:
- Presupposed actions in affirmative contexts elicited grip-force increases similar to asserted actions.
- Nonfactive complements and negated factive constructions showed weaker grip-force responses.
- Grip-force sensitivity appears linked to the construction of plausible event models.
Conclusions:
- Motor cortex activation reflects the integration of presupposed information into event models.
- The brain differentiates between asserted and presupposed information, with presuppositions engaging motor areas.
- Further research is needed to understand the specificity of projection and negation effects on motor responses.
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