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Gaze in Action: Head-mounted Eye Tracking of Children's Dynamic Visual Attention During Naturalistic Behavior
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Just-in-time: Gaze guidance in natural behavior.

Ashima Keshava1, Farbod Nosrat Nezami1, Henri Neumann2

  • 1Institute of Cognitive Science, University of Osnabrück, Osnabrück, Germany.

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Humans use "just-in-time" planning for novel tasks, not long-term memory. Eye movements and body actions are tightly coupled, with visual search occurring right before each action to guide behavior efficiently.

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Area of Science:

  • Cognitive Science
  • Neuroscience
  • Human-Computer Interaction

Background:

  • Natural eye movements are well-studied in over-learned tasks with fixed action sequences.
  • The activation pattern of cognitive schemas during novel, in-the-moment planning remains unclear.

Purpose of the Study:

  • To investigate action-oriented gaze behavior during novel, complex tasks.
  • To understand how cognitive planning influences eye and body movements in naturalistic settings.

Main Methods:

  • Recorded gaze and body movements in a virtual environment during a complex object-sorting task.
  • Introduced task complexity to necessitate cognitive planning and real-time decision-making.

Main Results:

  • Gaze fixations were tightly coupled with action onset, aligning with the sequence of actions.
  • Task complexity moderately influenced fixation proportions on relevant regions.
  • Gaze fixations were allocated "just-in-time" to action-relevant targets.
  • Planning involved increased visual search for task-relevant objects before action initiation.

Conclusions:

  • Natural behavior utilizes frugal working memory, avoiding long-term environmental encoding for planning.
  • Humans prefer "just-in-time" planning, searching for items moment-by-moment to guide actions.
  • This strategy involves visual search, action execution, and sequential task progression.