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Two alternative interfaces developed for military command and control were evaluated. The theoretical frameworks and concepts used during their development are discussed, and the findings are related to larger issues in display, interface, and system design. Key aspects of cognitive systems engineering (CSE) and ecological interface design (EID) are discussed. An ecological interface was designed with principles of direct perception, direct manipulation, and visual momentum. An experimental version of an existing interface was also developed. An experiment was conducted with a synthetic task environment that incorporated scenarios of tactical operations. Participants were experienced army officers. Dependent variables included status reports for friendly and enemy resources and activities, subjective workload, and information access. Significant results favoring the ecological interface were obtained for six of seven dependent measures. The ecological interface was easy to learn, easy to use, and dramatically more effective than the existing interface. The results are interpreted from the CSE-EID perspective, but insights from naturalistic decision making and situation awareness are also described. The specific design features of the ecological interface are directly applicable to military command and control and similar domains; the overall CSE-EID approach is applicable to interface design for all work domains.

Evaluation of an Ecological Interface Design for Military Command and Control