MicroSAINT Model of Fatigue Assessment
Abstract
There are more opportunities for fatigue related accidents when long or unusual duty cycles must be maintained. A means to plan for the likelihood of fatigue is described in this report. An equation was developed from results obtained in a 30-hour sleep deprivation study. These data were mathematically modelled and incorporated into the equation which also considers circadian variation in performance. A MicroSAINT model of a complex human task, the commit action of a weapons director aboard an AWAC aircraft, was developed to estimate the consequences of fatigue. Strong linear trends existed in the data so linear regression techniques were used. Significant amounts of the variance were accounted for by the equation for both accuracy and response time variables. A 36-hour sleep deprivation study was conducted to verify the model. The predicted performance trough was earlier but about the same magnitude as that observed. The approach outlined here seems reasonable for designing an equation to incorporate fatigue into computer models of complex behavior. Refinement of the model is needed using longer sleep deprivation periods that extend farther into the circadian cycle. Curvilinear data modelling techniques also are needed to account for more of the circadian rhythmicity.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 29, 1993
- Accession Number
- ADA284837
Entities
People
- Jonathan French
- Samuel G. Schiflett
Organizations
- Armstrong Laboratory