EFFECTS OF PICTORIAL RELATIVE SIZE AND GROUND-INTERCEPT INFORMATION ON JUDGMENTS ABOUT POTENTIAL COLLISIONS IN PERSPECTIVE DISPLAYS

Using perspective displays, observers judged whether two objects that approached each other in midair would collide. When objects were diffe rent sizes, observers often did not detect imminent collisions. Errors decreased with equal-sized objects or ground-intercept information. R esults from these limited conditions suggest that judgments about coll ision in perspective displays (e.g., three-dimensional displays of air craft) can be enhanced by minimizing ambiguities created by pictorial relative size cues. Results are consistent with studies of judgments a bout object-self collisions.