Development of a User-Defined Stressor in the Improved Performance Research Integration Tool (IMPRINT) for Conducting Tasks in a Moving Vehicle

Report No. ARL-MR-659
Authors: Josephine Q. Wojciechowski
Date/Pages: March 2007; 35 pages
Abstract: Human performance modeling tools are used to predict the effect of human performance on the system. The U.S. Army Research Laboratory developed a human performance modeling tool, the Improved Performance Research Integration Tool (IMPRINT), which allows an analyst to investigate the effect of subjecting operators to environmental stressors on mission performance. The latest version of IMPRINT has the capability to create user-defined stressors to study the effect of stressors on human performance and therefore system performance. This study used data that predict the effect on task time and performance based on task characteristics when Soldiers are riding in a moving vehicle to create a user-defined stressor in IMPRINT. A case study was completed on a simple model of command and control tasks. The user-defined stressor was applied to show the effect of completeing these tasks on task time and accuracy after participants were in a moving vehicle for 0, 1, 2, 3, 4, and 5 hours. The data from the study indicate that tasks are affected differently, but most data show an increase in time to complete and a decrease in the accuracy of the operator. This study shows the effect of operating in a moving vehicle. These data are useful not only to system design but also to the development of tactics and procedures.
Distribution: Approved for public release
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Last Update / Reviewed: March 1, 2007