Figure 5.

Example mongrels for target-present (row 1) and target-absent (row 2) patches, for three classic search conditions. (A) tilted among vertical; (B) orientation–contrast conjunction search; (C) T among L. How discriminable are target-present from target-absent mongrels? Inspection suggests that the summary statistic model correctly predicts easy search for tilted among vertical, more difficult conjunction search, and yet more difficult search for T among L, as validated by results in Figure 6.