Systems for monitoring and assessing performance in virtual or augmented reality

This invention describes a system for physical therapy that uses virtual or augmented reality. It guides a user's movements by displaying virtual targets, called event markers, within the virtual environment. The system moves these markers, tracks how the user interacts with them, and then calculates how well the user is following the guidance. If the user's performance is outside a desired range, the system automatically adjusts the marker's position to better guide them. It can also alter the user's view to assess their sense of body position and movement.