Figure 4.
Example target+distractor and distractor-only patches (columns 1 and 2) for 5 classic visual search conditions: (a) tilted among vertical; (b) orientation-contrast conjunction search; (c) T among L; (d) O among Q; and (e) Q among O. For each patch, we synthesized 10 mongrels – images having approximately the same summary statistics as the original patch. Examples are shown in the rightmost 4 columns, at increased contrast). Observers viewed each mongrel for unlimited time, and were asked to categorize them according to whether they thought there was a target present in the original patch.