A computer system records eye tracking data and identifies movements in the eye tracking data to generate a model of eye movement and pupil dynamics. The model is used to produce a performance metric for the user based on deviations of the predicted output from what is physically possible as defined by the bio-kinematic model. The system continuously stores eye tracking data to enhance the bio-kinematic models. Bio-kinematic models may be generalized or specific to a particular user. The system continuously adjusts and/or weights the bio-kinematic model in real-time based on eye tracking data.