Figure 16.4
A fourth experiment (d) tested parallel lines (dashed) or converging lines (solid). Again neither
popped out. A fifth experiment (e) tested closure with complete circles (dashed) or circles with a
gap of a fourth of their circumference (solid). A sixth experiment (f), again testing closure, had
complete circles (dashed) or circles with smaller gaps (solid). The size of the gap seemed to make no
difference: The incomplete circle popped out. On the other hand, a complete circle became harder to
find as the size of the gaps in distractors was reduced. Open dots represent data from trials in
which the display included only distractors.
Features and Objects in Visual Processing 407