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≪Organizer Abstract≫
Using field studies involving goal-directed task analysis we construct an psychological heuristic in form of an FFT for assessing threats at checkpoints in military operations. The FFT uses three cues: the number of occupants in the vehicle, whether the vehicle complies with military orders, and a catch-all cue. We augment this tree with specific guidelines for which actions to pursue, given a particular exit node. FFTs have been shown to be robust, predicting well in outof-sample populations. In addition, this FFT also has many advantages in application: it is frugal, using a single cue for 80% of decision situations in which it is applied); its structure is simple, making it easy to learn and communicate, and it is fast, allowing soldiers to quickly apply it under the time pressure of the given situation. Importantly, the FFT provides for specific guidelines on which actions should be employed in which situations.
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