A feasibility study of eye gaze with biofeedback in a human-robot interface

Area of Science:

• Robotics
• Human-Computer Interaction
• Assistive Technology

Background:

• Play is crucial for child development, enabling skill acquisition and environmental exploration.
• Assistive robots can facilitate play for children, but efficient navigation is key.
• Forbidden Region Virtual Fixture (FRVF) guidance offers potential for improved robot control.

Purpose of the Study:

• To investigate the feasibility of using eye gaze and alternative feedback (auditory, vibrotactile) with FRVF guidance for robot-assisted play.
• To assess the impact of FRVF guidance and alternative feedback on task performance in users with and without physical impairments.

Main Methods:

• A card sorting task was designed where eye gaze indicated targets and generated virtual walls.
• Alternative feedback modalities (auditory, vibrotactile) were used for gaze fixation confirmation, eliminating the need for a visual display.
• The system was tested by unimpaired adults, followed by case studies with children and individuals with physical impairments.

Main Results:

• Unimpaired adults showed no performance improvement with gaze fixation feedback or virtual walls.
• Alternative feedback enhanced gaze fixation speed and accuracy for all participants.
• Virtual walls significantly improved robot movement efficiency for participants with physical impairments and one child without impairment.

Conclusions:

• Alternative feedback and FRVF guidance show promise for improving robot-assisted play, particularly for users with physical impairments.
• This study demonstrates a feasible approach to robot-assisted play using gaze control and alternative feedback, reducing reliance on visual displays.