Fig. 1.

Averaged psychophysical curves across procedural groups for vehicle and the three highest drug doses. Location and Color groups are compared within the same panels. Data from the Location group are represented by open squares, whereas closed circles represent data from the Color group. The number of subjects being averaged for each dose is six, except for the following doses and groups: nicotine, Location, 1.7 mg/kg (5 s); haloperidol, Location, 0.7 mg/kg (2 s). Those numbers are shown within each panel. Error bars represent standard error of the mean.