Experiment 4 results showing performances, combined across all coherence levels and the two apertures, in response to algorithms WN (circle) and MN (square) as a function of matched spatial displacement under (a) low and (b) high contrast conditions. The temporal displacements of algorithms WN and MN are 8.33 ms and 25 ms, respectively at spatial displacements of 0.1° and 0.3°, and are 16.67 ms and 50 ms, respectively at 0.2° and 0.6°, which are shown near the corresponding data points in panel (a). Data presented in the first row is grouped by algorithm in panels (c) and (d) for WN and MN, respectively. Fixed stimulus duration is 400 ms.