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Creating Virtual-hand and Virtual-face Illusions to Investigate Self-representation
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Automatic imitation in a rich social context with virtual characters.

Xueni Pan1, Antonia F de C Hamilton1

  • 1Institute of Cognitive Neuroscience, University College London London, UK.

Frontiers in Psychology
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PubMed
Summary

Virtual Characters (VCs) enhance social congruency effects in action imitation tasks. Participants automatically imitated VC actions, unlike simple virtual balls, revealing insights into human-computer interaction and mimicry.

Keywords:
action sequencingautomatic imitationsocial facilitation effectvirtual charactersvirtual reality

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Area of Science:

  • Cognitive Psychology
  • Human-Computer Interaction
  • Social Neuroscience

Background:

  • Action observation and execution show congruency effects, where congruent actions yield faster responses.
  • Previous research often uses minimal stimuli, limiting ecological validity in social contexts.
  • Understanding automatic imitation in richer social settings is crucial for human-computer interaction.

Purpose of the Study:

  • To introduce and validate a novel method using interactive Virtual Characters (VCs) to study social congruency effects.
  • To investigate spatial and anatomical congruency effects in response to VCs versus non-social stimuli.
  • To explore the role of perceived humanness in modulating social facilitation during action imitation.

Main Methods:

  • Two experiments were conducted using sequential hand-arm actions presented by VCs and virtual balls.
  • Experiment 1 assessed spatial congruency effects.
  • Experiment 2 assessed anatomical congruency effects, comparing responses to VCs and virtual balls.

Main Results:

  • A robust spatial congruency effect was observed for both VCs and virtual balls.
  • Social facilitation was noted when participants perceived the VC as human.
  • Experiment 2 demonstrated automatic imitation of VC actions but not virtual ball actions, indicating a form-by-congruency interaction.

Conclusions:

  • Interactive VCs can elicit social congruency effects in a rich social context, extending previous findings with minimal stimuli.
  • The findings suggest automatic imitation of human-like agents, contributing to a more ecologically valid understanding of mimicry.
  • This research opens new avenues for studying automatic imitation in realistic social interactions.