Toward an Operational Definition of Workload: A Workload Assessment of Aviation Maneuvers

Abstract : As there is no one agreed upon definition of workload, there is no one accepted way to measure the construct. However, workload is an important variable in nearly every aviation-related research protocol. The primary objective of the study was to explore a new measure of workload assessment in an effort to move towards an operational definition of workload. Using this new workload assessment and definition, the present study characterized aviators' retrospective assessments of the workload involved in base and mission tasks related to the UH-60 A/L aircraft. A secondary objective was to examine the role of experience in workload assessments. Eligible participants were UH-60 Black Hawk instructor pilots or pilots enrolled in the UH-60 instructor pilot course at Fort Rucker. The present study demonstrated the new workload assessment was sensitive to various tasks and various workload dimensions. The results of this study also have applications for return-to-duty assessments for H-60 model aviators.

[1]  James C. Schueren,et al.  Using the Subjective Workload Dominance (SWORD) Technique for Projective Workload Assessment , 1991 .

[2]  Timothy L. White,et al.  Effects of Multimodal Displays About Threat Location on Target Acquisition and Attention to Visual and Auditory Communications , 2007 .

[3]  Fred H. Previc,et al.  Spatial Disorientation Countermeasures-Advanced Problems and Concepts , 2004 .

[4]  M. Bohanec,et al.  The Analytic Hierarchy Process , 2004 .

[5]  Pamela S. Tsang,et al.  The Roles of Immediacy and Redundancy Relative Subjective Workload Assessment , 1994 .

[6]  Joseph F. Horn,et al.  Flight Control Design for Alleviation of Pilot Workload During Helicopter Shipboard Operations , 2006 .

[7]  Glenn F. Wilson,et al.  Eeg and Subjective Measures of Private Pilot Workload , 1994 .

[8]  S G Hart,et al.  Pilot Errors as a Source of Workload , 1984, Human factors.

[9]  N. Moray.  Subjective Mental Workload , 1982 .

[10]  S G Hart,et al.  Inflight application of three pilot workload measurement techniques. , 1987, Aviation, space, and environmental medicine.

[11]  Mansour Rahimi,et al.  Evaluation of 16 Measures of Mental Workload using a Simulated Flight Task Emphasizing Mediational Activity , 1985 .

[12]  C. Wickens,et al.  The Sternberg memory search task as an index of pilot workload , 1986 .

[13]  Susan G. Hill,et al.  Workload Assessment of a Mobile Air Defense Missile System , 1988 .

[14]  Sandra G. Hart,et al.  Nasa-Task Load Index (NASA-TLX); 20 Years Later , 2006 .

[15]  K. Hendy,et al.  AN INFORMATION-PROCESSING MODEL OF OPERATOR STRESS AND PERFORMANCE. , 2001 .

[16]  Bor-Shong Liu,et al.  Inflight workload assessment: comparison of subjective and physiological measurements. , 2003, Aviation, space, and environmental medicine.