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Related Experiment Video

Updated: Aug 24, 2025

Examining Online Syntactic Processing of Spoken Complex Sentences in Chinese Using Dual-Modal Interference Tasks
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Working memory asymmetrically modulates auditory and linguistic processing of speech.

Yiguang Liu1, Cheng Luo1, Jing Zheng2

  • 1Research Center for Applied Mathematics and Machine Intelligence, Research Institute of Basic Theories, Zhejiang Lab, Hangzhou 311121, China.

Neuroimage
|October 21, 2022
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Summary

Working memory load impacts speech perception by altering neural activity. Higher loads weaken processing of sentences and phrases while boosting syllable tracking, suggesting domain-general mechanisms.

Keywords:
Auditory encodingLinguistic processingNeural trackingSpeech perceptionWorking memory

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Area of Science:

  • Cognitive Neuroscience
  • Auditory Perception
  • Human Brain Function

Background:

  • Working memory load is known to influence cognitive functions, including speech perception.
  • The precise mechanisms by which different components of the working memory system interact with specific speech processing stages remain unclear.

Purpose of the Study:

  • To investigate how working memory load modulates neural activity across different linguistic levels (syllables, phrases, sentences) during speech perception.
  • To determine if verbal and visual working memory loads affect speech processing similarly, indicating domain-general effects.

Main Methods:

  • Utilized a multiscale frequency-tagging approach to concurrently track neural activity at syllable, phrase, and sentence levels.
  • Employed a sentence comprehension task with manipulated working memory load (auditory verbal sequences vs. visual patterns).

Main Results:

  • Both verbal and visual working memory load similarly modulated speech processing.
  • Increased working memory load attenuated neural tracking of phrases and sentences.
  • Conversely, higher working memory load enhanced neural tracking of syllables.

Conclusions:

  • Working memory load's influence on speech processing appears to stem from domain-general working memory components.
  • Working memory load asymmetrically affects lower-level auditory encoding and higher-level linguistic processing, potentially due to attention reallocation.