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Area of Science:

  • Cognitive Neuroscience
  • Human-Computer Interaction
  • Robotics

Background:

  • Visual attention is typically goal-directed, influenced by anticipated actions.
  • Generalizability of gaze behavior in naturalistic settings remains unclear.
  • Understanding action affordances' impact on visual attention is crucial for designing intuitive interfaces.

Purpose of the Study:

  • To investigate how action affordances influence active inference and eye movements during tool interaction.
  • To differentiate between fixation patterns for familiar and novel tools in varying realism environments.
  • To explore the role of visual attention in planning both distal task goals and proximal grasp actions.

Main Methods:

  • Between-subject design comparing virtual reality (low realism) with a high-realism interaction setup.
  • Analysis of fixation odds and eccentricity towards tool parts before action initiation.
  • Participants interacted with tools, performing tool-specific movements.

Main Results:

  • Increased fixation on a tool's effector part before action initiation, particularly for unfamiliar tools and tool-specific movements.
  • Fixations suggest planning of distal goals (task- and tool-specific actions) well before execution.
  • Higher realism led to fixation bias towards the tool handle when incongruent with handedness, suggesting proximal grasp planning.

Conclusions:

  • Visual attention is actively used for planning actions, both distal task goals and proximal grasp adjustments.
  • The degree of action realism significantly contextualizes visual planning strategies.
  • Findings inform the design of interactive systems by highlighting the importance of affordances in guiding attention and action.