A Model for the Pilot's Use of Motion Cues in Roll-Axis Tracking Tasks.

An experimental and analytical study was undertaken to test a model for the pilot's use of motion cues in roll-axis tracking tasks. Simulated target-following and disturbance-regulations tasks were explored with subjects using visual-only and combined visual and motion cues. The effects of motion cues on task performance and pilot response behavior were appreciably different for the two task configurations and were consistent with data reported in earlier studies for similar task configurations. The 'optimal-control' model for pilot/vehicle systems provided a task-independent framework for accounting for the pilot's use of motion cues. Results were consistent with the hypothesis of attention-sharing between visual and motion variables.