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Creating a communication system from scratch: gesture beats vocalization hands down.

Nicolas Fay1, Casey J Lister1, T Mark Ellison1

  • 1School of Psychology, University of Western Australia Crawley, WA, Australia.

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Summary
This summary is machine-generated.

People can rapidly create communication systems when needed. Gesture is the most effective modality for establishing shared meaning, outperforming vocalizations or combined methods.

Keywords:
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Area of Science:

  • Cognitive Science
  • Psycholinguistics
  • Human Communication

Background:

  • Establishing shared communication systems is fundamental for social interaction.
  • Understanding how novel communication systems emerge is crucial for fields like linguistics and cognitive science.
  • Previous research has explored various aspects of communication, but direct experimental comparisons of modality effectiveness in novel system creation are limited.

Purpose of the Study:

  • To experimentally investigate how different communication modalities (vocalization, gesture, combined) influence the ability to create a novel communication system from scratch.
  • To compare the effectiveness of non-linguistic vocalization versus gesture in establishing shared sign-meaning mappings within dyads.
  • To determine if combining vocalization and gesture enhances communication system creation compared to unimodal approaches.

Main Methods:

  • Pairs of participants were tasked with communicating pre-specified items (emotions, actions, objects) over multiple trials.
  • Communication was conducted using one of three modalities: non-linguistic vocalization alone, gesture alone, or a combination of vocalization and gesture.
  • Communication success and the degree of sign-meaning alignment within dyads were measured.

Main Results:

  • Gesture-alone significantly outperformed vocalization-alone in both successful communication and the establishment of shared sign-meaning inventories (sign alignment).
  • The combined modality of vocalization and gesture did not yield superior performance compared to gesture-alone.
  • For communicating action items, gesture-alone proved more effective than the combined modality.

Conclusions:

  • Individuals can rapidly develop functional communication systems when lacking a shared one.
  • Gesture emerges as the most effective modality for the initial creation of novel, shared communication systems.
  • The findings suggest that gesture plays a pivotal role in the emergence of symbolic communication.