TASK-PERFORMANCE IN VIRTUAL ENVIRONMENTS USED FOR COGNITIVE REHABILITATION AFTER TRAUMATIC BRAIN INJURY

Objective: This report describes a reliability study using a prototype computer-simulated virtual environment to assess basic daily living s kills in a sample of persons with traumatic brain injury (TBI). The be nefits of using virtual reality in training for situations where safet y is a factor have been established in defense and industry, but have not been demonstrated in rehabilitation.Subjects: Thirty subjects with TBI receiving comprehensive rehabilitation services at a residential facility. Methods: An immersive virtual kitchen was developed in which a meal preparation task involving multiple steps could be performed. The prototype was tested using subjects who completed the task twice w ithin 7 days. Results: The stability of performance was estimated usin g intraclass correlation coefficients (ICCs). The ICC value for total performance based on all steps involved in the meal preparation task w as .73, When three items with low variance were removed the ICC improv ed to .81. Little evidence of vestibular optical side-effects was note d in the subjects tested. Conclusion: Adequate initial reliability exi sts to continue development of the environment as an assessment and tr aining prototype for persons with brain injury. (C) 1998 by the Americ an Congress of Rehabilitation Medicine and the American Academy of Phy sical Medicine and Rehabilitation.