Figure 4.

Performance in the four search conditions. a) d′ as a function of target eccentricity. b) Mean search duration for correct trials as a function of the target’s eccentricity. c) Search performance in d′ per second as a function of the target’s eccentricity. All data were averaged across target directions and across participants. Error bars show one SEM. For better discriminability data points are shifted slightly apart on the horizontal axes.