Preliminary Validation of the Task Analysis/Workload Methodology
Abstract
Over the past 8 years, the U.S. Army Research Institute for the Behavioral and Social Sciences (ARI) has sponsored the development of the Task Analysis/Workload (TAWL) methodology. The methodology is used to develop computer-based models that predict the operator workload of Army weapon systems. The TAWL methodology has been used to predict operator workload in existing and modified versions of the AH-64, UH-60, and CH-47 aircraft. This preliminary research was designed to assess the validity of the methodology. Seven experimental task conditions, analogous to rotorcraft operation and designed to vary in workload, were used in the research. Two TAWL workload prediction models of the conditions were independently developed by two analysts. Twenty AH-64A aviators performed repeated trials in each of the task conditions. Measures of the aviators' task performance, subjective workload, and physio logical workload were obtained as TAWL model validity criteria. Although there were some differences between the models developed by the two analysts, the predictions generated by the models were highly correlated. In addition, the correlations between the average TAWL predictions for both models and the criterion measures were Workload prediction, Workload, NASA-TLX, Task analysis, Aviator workload, Workload measures, Modeling, Function analysis, Aviator performance, Mission analysis significant and high (between .89 and .99). The results support the validity of the TAWL methodology.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1993
- Accession Number
- ADA267514
Entities
People
- David B. Hamilton
- Kenneth D. Cross