Psychophysical evaluation of haptic perception under augmentation by a handheld device

Bing Wu, Roberta Klatzky, Randy Lee, Vikas Shivaprabhu, John Galeotti, Mel Siegel, Joel S. Schuman, Ralph Hollis, George Stetten

Research output: Contribution to journalArticlepeer-review

Abstract

Objective: This study investigated the effectiveness of force augmentation in haptic perception tasks. Background: Considerable engineering effort has been devoted to developing force augmented reality (AR) systems to assist users in delicate procedures like microsurgery. In contrast, far less has been done to characterize the behavioral outcomes of these systems, and no research has systematically examined the impact of sensory and perceptual processes on force augmentation effectiveness. Method: Using a handheld force magnifier as an exemplar haptic AR, we conducted three experiments to characterize its utility in the perception of force and stiffness. Experiments 1 and 2 measured, respectively, the users ability to detect and differentiate weak force (<0.5 N) with or without the assistance of the device and compared it to direct perception. Experiment 3 examined the perception of stiffness through the force augmentation. Results: The users ability to detect and differentiate small forces was significantly improved by augmentation at both threshold and suprathreshold levels. The augmentation also enhanced stiffness perception. However, although perception of augmented forces matches that of the physical equivalent for weak forces, it falls off with increasing intensity. Conclusion: The loss in the effectiveness reflects the nature of sensory and perceptual processing. Such perceptual limitations should be taken into consideration in the design and development of haptic AR systems to maximize utility. Application: The findings provide useful information for building effective haptic AR systems, particularly for use in microsurgery.

Original languageEnglish (US)
Pages (from-to)523-537
Number of pages15
JournalHuman Factors
Volume57
Issue number3
DOIs
StatePublished - May 23 2015

Keywords

  • augmented reality
  • force perception
  • haptic interfaces
  • perceptual effectiveness
  • stiffness perception

ASJC Scopus subject areas

  • Human Factors and Ergonomics
  • Applied Psychology
  • Behavioral Neuroscience

Fingerprint

Dive into the research topics of 'Psychophysical evaluation of haptic perception under augmentation by a handheld device'. Together they form a unique fingerprint.

Cite this