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A also involves both a temporal and a spatial component. Time is an important concept in SA, as SA is a dynamic construct, changing at a tempo dictated by the actions of individuals, task characteristics, and the surrounding environment. As new inputs enter the system, the individual incorporates them into this mental representation, making changes as necessary in plans and actions in order to achieve the desired goals.
SA also involves spatial knowledge about the activities and events occurring in a specific location of interest to the individual.
Concept of SA includes perception, comprehension, and projection of situational information, as well as temporal and spatial components.
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In summary, the model consists of several key factors:
u Perception, comprehension, and projection as three levels of SA, u The role of goals and goal directed processing in directing attention and interpreting the significance of perceived information, u The role of information salience in "grabbing" attention in a data-driven fashion, and the importance of alternating goal-driven and data-driven processing, u The role of expectations (fed by the current
model of the situation and by long-term memory stores) in directing attention and interpreting information,
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