In an example embodiment, this disclosure provides a computer system that includes a processor configured to compute, based on test performance data of a user, at least one performance variable characterizing balance and postural stability, and at least one performance variable characterizing vestibulo-ocular reflex (VOR). For each performance variable, processor can compute a respective score based on the respective performance variable and based on a set of performance metrics. The at least one computed score can be output via an output device.