Virtual Reality Based Interventions After Brain Injury

The overarching aim of this project is to evaluate the effectiveness of CogTech's technology-assisted interventions on cognitive and visual functioning in patients undergoing rehabilitation following acquired brain injury. Within the scope of this umbrella project, the initial intervention to be evaluated is VR gaming. The first aim is to investigate the feasibility of a VR-game clinical trial. The feasibility study will be conducted with approximately ten patients. The primary aim of this phase is to inform key design decisions for a subsequent RCT (including 90 patients). Specifically, the feasibility study will evaluate: the suitability of different VR games and headsets, the optimal intensity and duration of the VR-based training sessions, and the appropriate level and format of therapist involvement during the intervention.

Participants will be recruited from both the inpatient and outpatient units at the Department of Rehabilitation Medicine, Danderyd Hospital. Before enrollment in a rehabilitation program, all patients are comprehensively assessed by the rehabilitation team ("the assessment phase", with a typical duration of two to three weeks). During this phase, a neuropsychological assessment is performed by a neuropsychologist and an activity-based assessment is performed by an occupational therapist. Based on these assessments, the rehabilitation team concludes whether attention deficits are present and direct attention training is indicated (Attention Process Training11 is the standard at the clinic). Participants will be recruited among these patients. The VR intervention will be offered as an add-on to the other interventions in the rehabilitation program. The content of the rehabilitation program varies between patients, but typically includes attention process training for attention deficits, strategy training for executive deficits and physiotherapy for physical and motor deficits. The length of the rehabilitation program is typically 12 to 16 weeks.

In the feasibility study, eligible patients will consequently be informed about the study after the clinical assessment phase and will be asked for informed consent (n=10). Following the recruitment to the VR-intervention, five patients will be asked to serve as control participants. They will undergo the baseline assessment and the post-intervention assessment, but will not do the VR-based training.

Following informed consent, baseline assessments will be conducted and demographic and injury-related data will be collected. Some of the tests that will be used in the study will already have been administered as part of the clinical routine. These tests will not be re-administered in the pre-assessment. Following informed consent, the clinical psychologist who has assessed the patient will hand over the test results along with demographic and injury-related data to the responsible researcher.

Post-intervention assessments will be conducted after the 5-week training period and before the patient is discharged. All measures from the pre-assessment will be readministered, except WAIS (Wechsler Adult Intelligence Scale)-IV Matrix Reasoning, Rey Auditory Verbal Learning Task, Rey Complex Figure Task. We do not expect an intervention effect on these measures but they are potentially modifiers of treatment effect. A satisfaction questionnaire developed in house will be used and will only be administered post-intervention.

In the feasibility study, the focus will be to evaluate different VR games and headsets, the optimal intensity and duration of the VR-based training sessions, and the appropriate level and format of therapist involvement during the intervention. Results on the SIMS and the satisfaction questionnaire will be emphasized, but pre- to post changes on all measures will be calculated.