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Psychophysical evaluation of haptic perception under augmentation by a handheld device.
Bing Wu1, Roberta Klatzky2, Randy Lee3
1Arizona State University, Mesa, Arizona Bing.Wu@asu.edu.
Human Factors
|April 16, 2015
Summary
Force augmentation in haptic systems significantly improves detection and differentiation of weak forces. Perceptual limitations impact effectiveness at higher intensities, informing haptic augmented reality (AR) design.
Area of Science:
- Human-Computer Interaction
- Haptics and Robotics
- Perceptual Psychology
Background:
- Force augmented reality (AR) systems are engineered for delicate tasks like microsurgery.
- Limited research exists on the behavioral outcomes and perceptual impacts of force augmentation.
Purpose of the Study:
- Investigate the effectiveness of force augmentation in haptic perception.
- Characterize the utility of a handheld force magnifier in perceiving force and stiffness.
Main Methods:
- Three experiments were conducted using a handheld force magnifier.
- Assessed user ability to detect and differentiate weak forces (<0.5 N) with and without augmentation.
- Examined perception of stiffness through force augmentation.
Main Results:
- Force augmentation significantly improved detection and differentiation of small forces.
- Stiffness perception was enhanced by augmentation.
- Perception of augmented forces matched physical equivalents for weak forces but decreased with intensity.
Conclusions:
- Perceptual limitations influence force augmentation effectiveness.
- Design of haptic AR systems should consider sensory and perceptual processing.
- Findings offer insights for developing effective haptic AR for microsurgery.
