SECONDARY TASK MEASUREMENT OF WORKLOAD AS A FUNCTION OF SIMULATED VEHICLE DYNAMICS AND DRIVING CONDITIONS

Measures of spare mental capacity have been employed in various situations to permit assessment of human operator loading in a particular work task. A driving simulator with a six-degree of freedom computer-generated display, a four degree of freedom physical motion system, and a three-channel sound system was used to determine the sensitivity of a secondary task to vehicle handling parameters and various driving conditions. Six subjects drove a simulated vehicle with normal automobile handling and another six drove with degraded handling (slow response). Steering ratio and disturbance level were adjusted within each set six subjects. A secondary task consisting of reading random digits aloud from a single-digit dashboard display was used to assess workload. It was found that workload increased significantly as disturbance level increased. Furthermore, workload increased significantly with degraded vehicle handling. In contrast, increasing steering ratio did not produce a significant change in workload. These results indicate that the secondary task method can be used to assess the major effects of simulated vehicle handling on driver workload.

  • Availability:
  • Corporate Authors:

    Human Factors Society

    Johns Hopkins University Press
    Baltimore, MD  United States  21218
  • Authors:
    • Wierwille, W W
    • Gutmann, J C
    • Hicks, T G
    • Muto, W H
  • Publication Date: 1977-12

Media Info

  • Features: References;
  • Pagination: p. 557-565
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00176765
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Jun 28 1978 12:00AM