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John Hassoun

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Publications by John Hassoun (bibliography)

1992

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Rueb, Justin, Vidulich, Michael and Hassoun, John (1992): Establishing Workload Acceptability: An Evaluation of a Proposed KC-135 Cockpit Redesign. In: Proceedings of the Human Factors Society 36th Annual Meeting 1992. pp. 17-21.

“Workload assessment has become a common part of system evaluation. Workload assessment is an important adjunct to performance measurement because the operator is sometimes flexible enough to disguise excessively demanding systems by expending additional effort to overcome optimal information processing limits. This is often referred to as the problem of determining a "workload redline." The present paper recounts an evaluation of a proposed redesign of the KC-135 tanker aircraft cockpit. The current KC-135 cockpit has three crew positions: pilot, copilot, and navigator. As part of a proposed redesign, modern automation capabilities to replace the navigator were considered. Ten operational KC-135 crews and two KC-10 crews were studied while performing missions of differing levels of workload in a high-fidelity simulator. Three main classes of data relevant to the redline issue were collected: Performance data, Subjective Workload Assessment Technique (SWAT) ratings, and Subjective WORkload Dominance (SWORD) ratings. Evaluation of the performance results demonstrated that the redesigned cockpit could be flown in accordance to regulations. This was a necessary first step, but could not ensure that acceptable workload had been obtained. Taken together, the SWAT and SWORD results strongly suggested that acceptable performance can be achieved at acceptable levels of workload. In conclusion, the present study is a prototypical example of using available assessment tools to determine system acceptability. These tools should be useful for many other system evaluations.”

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Gawron, Valerie J., Hughes, Thomas, Hassoun, John and Bailey, Randall (1992): Comparison of a Head-Up Display Evaluation in Ground and Flight Simulation. In: Proceedings of the Human Factors Society 36th Annual Meeting 1992. .

1990

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Wilson, Glenn F., Hughes, Edward and Hassoun, John (1990): Physiological and Subjective Evaluation of a New Aircraft Display. In: D., Woods, and E., Roth, (eds.) Proceedings of the Human Factors Society 34th Annual Meeting 1990, Santa Monica, USA. pp. 1441-1443.

“Physiological, subjective and mission effectiveness measures were evaluated to test their relative sensitivity and diagnosticity to pilot workload in a part-mission simulation. Two different radar displays were evaluated in an air-to-air simulated scenario using an advanced horizontal situation format display vs the conventional radar display. Data were recorded during the ingress and engagement portions of the mission. The engagement segments were associated with higher subjective workload estimates, smaller cardiac IBIs, fewer eye blinks and shorter duration eye blinks. The new display was associated with shorter duration eye blinks than the current generation display. None of the other measures were associated with statistically significant changes due to display type.”

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