THE EFFECT OF TRAINING ON ACCURACY OF ANGLE ESTIMATION.
GEORGE WASHINGTON UNIV ALEXANDRIA VA HUMAN RESOURCES RESEARCH OFFICE
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This study examined the feasibility of using direct perceptual estimation on maps to determine angles of drift, and the effect of training on this ability. Subjects were divided into a control group and two training groups, one of which was trained using angles drawn on plain white cards, and the other using angles drawn on both cards and tactical maps. Both training groups initially estimated the size of angles, ranging from 1 to 18 degrees, with a mean absolute error of 2.57 degrees and a mean algebraic error of -0.20 degrees. After training, absolute error was 1.34 degrees and algebraic error was 0.43 degrees. A job aid consisting of reference angles of 5, 10, and 15 degrees did not significantly affect performance on map items, although on card items, performance of the training groups shifted from underestimation to slight overestimation of angle size. Author