Usability evaluation of an instructional application based on Google Glass for mobile phone disassembly tasks. (May 2019)

• Record Type: Journal Article
• Authors: Wang, Chao-Hung; Tsai, Ni-Hsin; Lu, Jun-Ming; Wang, Mao-Jiun J.
• Is Part Of: Applied ergonomics. Volume 77(2019)
• Page Start: 58
• Page End: 69
• Publication Date: 2019-05
• Subjects: Google glass -- Augmented reality -- Usability -- Visual fatigue; Human engineering -- Periodicals; 620.82
• DOI: 10.1016/j.apergo.2019.01.007
• Languages: English
• ISSNs: 0003-6870

Abstract

Abstract: This study aims at comparing a Google Glass-based instructional application with a printed manual in mobile phone disassembly tasks. Thirty participants (15 males and 15 females) were recruited to perform tasks via three types of instructional methods (Google Glass-based augmented reality, Google Glass-based video, and a printed manual). The objective measures of performance (task completion time, error counts), and the subjective measures (NASA-Task Load Index, system usability scale) were considered. Additionally, visual fatigue was assessed by critical flicker fusion frequency and near point accommodation. According to the findings, although the printed manual method produced better results regarding mental workload and system usability, the augmented reality method improved error reduction and efficiency. Furthermore, the participants indicated that the displayed animations were helpful in locating the exact work-pieces. The augmented reality method is believed to be a potential alternative to printed manuals in mobile disassembly tasks. Highlights: Two methods of a Google Glass-based instructional application for mobile phone disassembly/maintenance tasks were compared. Significant NPA changes were found only in the right eye measures. The Google Glass-based augmented reality method resulted in minimum errors and adequate task completion time. The overall usability of the Google Glass-based instructional application needs further improvement.