Abstract
Twelve experienced tactical crew members served as subjects in a study which compared three synonymous sets of tactical contact symbols under conditions of color/monochrome and high/low density. Time and accuracy data of responses to stimulus displays were collected and analyzed, and subjective findings were obtained through post-experiment questionnaires and interviews. The National Tactical Data System symbology produced significantly better results than the two other symbologies, and was favored most by subjects. This presentation describes the study and offers an explanation of the results based on Anne Triesman's findings of preattentive visual processing.
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