Variable Feedback Experiments Testing a Sampled Data Model for Eye Tracking Movements

A sampled data model is presented to describe the action of the control system for directing human gaze at a moving target. The plausibility of the model is supported by its successful prediction of experimental tracking characteristics under variable effective visual feedback. The feedback is altered by addition of an external signal from measured eye position to target position, and its effects on the frequency and transient responses of the model and the experimental records are compared.