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Updated: Oct 9, 2025

Author Spotlight: Deciphering the Cognitive and Neural Mechanisms of Gesture in Communication
Published on: January 26, 2024
Covert Attention to Gestures Is Sufficient for Information Uptake
Kendra Gimhani Kandana Arachchige1, Wivine Blekic1, Isabelle Simoes Loureiro1
1Department of Cognitive Psychology and Neuropsychology, University of Mons, Mons, Belgium.
Iconic gestures aid speech comprehension, even without direct eye fixation. Information extraction from gestures occurs even when attention is covert, particularly with degraded speech.
Area of Science:
- Cognitive Psychology
- Linguistics
- Neuroscience
Background:
- Iconic gestures enhance speech comprehension.
- Limited research exists on visual attention allocation to gestures during clear vs. degraded speech.
- Understanding information extraction from gestures is crucial for comprehension.
Purpose of the Study:
- To investigate the effect of iconic gestures on speech comprehension.
- To determine if fixating on gestures is necessary for information extraction.
- To analyze attention allocation to different gesture types under varying speech clarity.
Main Methods:
- Participants watched video clips with gestures in clear, partly degraded, or fully degraded speech.
- Eye-tracking technology recorded participants' gaze patterns.
- Comprehension was assessed through post-video questions.
Main Results:
- Gesture type influenced attention; degraded speech reduced attention to gestures.
- Semantically incongruent gestures impaired comprehension without fixation.
- Congruent gestures improved comprehension without fixation.
Conclusions:
- Covert attention is sufficient for processing gesture-derived information.
- Gestures can enhance comprehension even when not directly fixated.
- Speech degradation impacts attentional focus on accompanying gestures.
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