A dissociation of objective and subjective workload measures in assessing the impact of speech controls in advanced helicoptersAmong the new technologies that are expected to aid helicopter designers are speech controls. Proponents suggest that speech controls could reduce the potential for manual control overloads and improve time-sharing performance in environments that have heavy demands for manual control. This was tested in a simulation of an advanced single-pilot, scout/attack helicopter. Objective performance indicated that the speech controls were effective in decreasing the interference of discrete responses during moments of heavy flight control activity. However, subjective ratings indicated that the use of speech controls required extra effort to speak precisely and to attend to feedback. Although the operational reliability of speech controls must be improved, the present results indicate that reliable speech controls could enhance the time-sharing efficiency of helicopter pilots. Furthermore, the results demonstrated the importance of using multiple assessment techniques to completely assess a task. Neither the objective nor the subjective measures alone provided complete information. It was the contrast between the measures that was most informative.
Document ID
19890044307
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Vidulich, Michael A. (USAF, Aerospace Medical Research Laboratory, Wright-Patterson AFB OH, United States)
Bortolussi, Michael R. (Western Aerospace Laboratories, Inc. Moffett Field, CA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1988
Subject Category
Behavioral Sciences
Meeting Information
Meeting: Annual Meeting of the Human Factors Society