A virtual reality controller with movement re-mapping for stroke rehabilitation

• Main Author: Barhoush, Y. (Yazan)
• Format: Dissertation
• Language: English
• Published: University of Oulu 2019
• Online Access: http://jultika.oulu.fi/Record/nbnfioulu-201906272674

Abstract. This thesis describes the design, implementation, and evaluation of a proof-of-concept controller to use in post-stroke upper-limb disability rehabilitation in virtual reality (VR). The controller provides a VR real-life re-mapping for object interaction, considering the level of disability as well as a sensation when interacting with objects as a form of feedback. The motivation of this thesis stems from the exponentially expanding number of various VR applications that are being created for the intervention and assessment of a wide scope of motor rehabilitation needs. There is increasing evidence that delineates how enriched virtual environments might be utilized as a therapy tool, in which VR can be added to furnish a learning experience adapted to individual users. Based on the literature review, an explorative user-centered design approach was followed throughout the design and implementation phase, where rapid prototyping iterations were made based on user feedback. The main challenge in designing the controller was integration of some of the default operations provided by current commercial VR controllers (pointing, trigger, button selection) with a re-mapping for the disability level for rehabilitation recovery and haptic feedback. When compared to existing controllers, the proof-of-concept controller maintained a limited functionality only with the feasibility and readiness for implementing more functionalities in the future. Leveraging the user’s familiarity to facilitate a smooth transition is hoped for as well as the possibility for being used with existing applications and future use cases. An experiment was performed, aiming at investigating the overall feel (attractiveness and user-friendliness) of the controller in a VR setting as well as its effectiveness and reliability in emphatically remapping different VR real-life levels for disability rehabilitation. A usability questionnaire, a presence questionnaire, and a short interview were used as a means for evaluating to assess this aim. Results and users’ experiences, when using the system, are presented and certain limitations are reflected upon. The outcome shows that the controller is desired by its users, and the overall experience of the virtual environment and disability re-mapping are immersive.