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Abstract (Maximum 200 Words) (abstract should contain no proprietary or confidential information)The SBIR Phase I goals were to (1) to develop and eventually validate a computational model of shared Situation Awareness (SA) and (2) identify a potentially unobtrusive measure of SA for military teams. The following objectives were achieved in Phase I: (1) assess the potential teams and tasks (identify data collection and model validation needs); (2) assess and create the measures used in the model creation (review the modeling literature and select factors that are related to SA, mental models and shared cognition); (3) collect and analyze the data (data was gathered from three separate military exercises); (4) perform the Social Network Analysis (SNA) and create the shared SA model and (5) identify other factors that need to be included in the model to improve the SA prediction capabilities as well as identify model validation needs. Our research strives to create both a model of shared SA as well as an unobtrusive measure of SA. The model may be thought of as a low cost, unobtrusive, real-time measure of SA. By understanding the various factors that make up shared SA we can create a predictive model of SA using these factors as well as a real time measure of SA.14. Subject Terms (keywords previously assigned to proposal abstract or terms which apply to this award)