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Speech Planning at Turn Transitions in Dialog Is Associated With Increased Processing Load
Mathias Barthel1, Sebastian Sauppe2
1Language and Cognition Department, Max Planck Institute for Psycholinguistics.
Cognitive Science
|July 17, 2019
Summary
Planning spoken responses during conversation overlap increases cognitive load. This study found that overlap, especially with sentence-final verbs, elevates processing demands for speakers, impacting speech planning.
Area of Science:
- Psycholinguistics
- Cognitive Science
- Computational Linguistics
Background:
- Conversational speech planning often occurs concurrently with a partner's ongoing utterance.
- Understanding the cognitive load associated with overlapping speech planning is crucial for dialog research.
Purpose of the Study:
- To investigate the processing load of planning spoken responses during conversational overlap.
- To determine the impact of sentence-final predictability on this processing load.
Main Methods:
- A dialogic experiment was conducted where participants described objects in turns with a confederate.
- Confederate utterances varied in ending type (verb/noun) and predictability.
- Task-evoked pupillary responses (TEPR) were measured to assess processing load.
Main Results:
- Response planning in overlap with sentence-final verbs significantly increased TEPR, indicating higher processing load.
- The predictability of sentence endings did not affect processing load.
- Speakers plan responses in overlap even with increased cognitive demands.
Conclusions:
- Planning spoken responses during overlap with incoming turns increases cognitive processing load.
- Speakers do not appear to adjust response planning timing based on predictions of turn endings.
- Conversational turn-taking dynamics impose processing pressure on the language system.
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