Development of a Virtual Reality-based Comprehensive Cognitive Functions Test for People with Aphasia

DOI Web Site 9 References
  • Kojima Maki
    Department of Rehabilitation Medicine, Nishiyamato Rehabilitation Hospital.
  • Okahashi Sayaka
    Department of Human Health Sciences, Graduate School of Medicine, Kyoto University
  • Luo Zhiwei
    Department of Computational Science, Graduate School of System Informatics, Kobe University
  • Nagano Akinori
    Faculty of Sport and Health Science, Ritsumeikan University
  • Sakai Hiromi
    Department of Health Sciences, Tokyo University of Technology
  • Seki Keiko
    Department of Rehabilitation Science, Graduate School of Health Sciences, Kobe University

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  • Virtual Reality (VR) 技術を用いた失語症者の 総合的認知機能検査の開発

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<p>  We developed the Virtual Shopping Test-easy version (VST-e) , a new virtual reality based shopping task, to assess the comprehensive cognitive status of various aphasic patients. The purposes of this study were to examine the application of VST-e to aphasic patients, and to examine the validity and reliability of VST-e. Twenty left hemisphere-damaged stroke patients with aphasia and twenty age and education-matched healthy adults with no brain damage performed VST-e. In this test, after a demonstration with visual information and practice session, the participants were asked to buy two specific items in the virtual shopping mall by touching the PC screen as quickly and correctly as possible. They memorized the content of the shopping list in advance, and used hints on the screen when needed during the performance. The application of VST-e to aphasic patients was examined by comparing VST-e performance between the two groups and by analyzing correlations between VST-e variables and a verbal function test. The criterion-validity of VST-e was examined by analyzing correlations between VST-e variables and conventional neuropsychological tests (RCPM, SDMT, SRT, Symbol Cancellation, Symbol Trails, Design Memory, and Mazes) in the aphasia group. The reliability of VST-e was examined by calculating Cronbachʼs α. The results showed that VST-e performance was lower in the aphasic group than in the healthy group regarding the number of times using hints, the number of times making a turn on the shopping street, and the required time to accomplish one task. VST-e variables correlated significantly with verbal function, intelligence, attention, and executive function. Cronbachʼs α was 0.62. Although VST-e is affected by verbal ability, VST-e has criterionrelated validity and reliability. These results suggest that VST-e can be a useful tool to evaluate general cognitive functions in aphasic patients.</p>

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