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Gaze facilitates responsivity during hand coordinated joint attention.

Nathan Caruana1,2, Christine Inkley3, Patrick Nalepka4,5,6

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Humans use gaze cues for joint attention, even when pointing gestures are present. Responders react faster to joint attention cues when gaze and pointing align, showing gaze information is processed implicitly.

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Area of Science:

  • Cognitive Psychology
  • Social Neuroscience
  • Human-Computer Interaction

Background:

  • Joint attention is crucial for social interaction, traditionally studied using gaze cues.
  • Pointing gestures offer spatially precise attention cues, often accompanying gaze.
  • The interplay between gaze and pointing in joint attention remains underexplored.

Purpose of the Study:

  • To investigate how responders use initiator gaze information for joint attention when pointing gestures are present.
  • To determine if gaze cues are utilized even when visually salient and precise pointing cues are available.
  • To examine the impact of gaze-pointing congruence on joint attention response times.

Main Methods:

  • A novel virtual reality paradigm was developed for cooperative joint attention tasks.
  • Dyadic interactions were recorded using eye and hand tracking for objective behavioral measures.
  • Initiator and responder gaze and pointing behaviors were analyzed in relation to joint attention cues.

Main Results:

  • Initiators' gaze was spatially congruent with their subsequent pointing gestures.
  • Responders attended to the initiator's face, processing gaze information.
  • Faster saccadic reaction times were observed when initiator gaze aligned with pointing gestures.

Conclusions:

  • Gaze information facilitates joint attention responsivity, even when implicit and accompanied by explicit pointing cues.
  • The congruence between gaze and pointing enhances attentional processing and response efficiency.
  • This study highlights the integrated use of multiple social cues in guiding joint attention.