Figure 2.

(Top row) Screen shots showing examples of the three levels of crowd density (low, medium, and high). (Bottom left) No-clutter condition in which task-irrelevant features and objects are absent. (Bottom right) Top–down view of the hallway showing the possible target walking paths. Black lines represent the initial start of a target's path into the hallway, dashed red lines are paths taken on the same side as the target entered, and solid yellow lines represent a path crossing in from of the viewer. Distance 1 represents the closest location and distance 4 the farthest, with an equivalent spacing between each of the four distances.