Figure 6.

Density of target contour pixels, plotted for short and long contours (top and bottom rows, respectively) and all levels of contour complexity (columns, increasing in complexity from left to right). Target density decreases sigmoidally with eccentricity, but does so approximately equivalently for all conditions, meaning that complexity is not confounded with target complexity. That is, although searching near fixation was an effective strategy (subjects were asked to fixate but eye movements were not controlled), such a strategy was no more or less likely to be effective at low levels of contour complexity than at high levels.