| Seventeen Controllers performed in shared and traded supervisory control states. Shared control is the performance of a task by a human operator with the concurrent assistance of automation. Traded control is the process of shifting the handling of a task by either the human operator or automation. In the shared condition, controllers monitored the airspace with the assistance of a conflict probe. In the traded condition, controllers performed a secondary task, in addition to monitoring the traffic with the assistance of the conflict probe. The researcher also manipulated the percentage of planes in free flight, 80% and 100%. Indices included controller workload, separation performance, and secondary task performance. Results indicated that workload was significantly higher in the traded condition, and that there were less separation violations in the shared condition. The participants also performed better on the secondary task in the Traded/100% condition than the Traded 80% condition. |
