Figure 1.

(Top) Schematic diagram of the attentional set shifting apparatus. A fixed Plexiglas panel divided the distal third of the arena into two sections, and a digging pot was placed in each section. A removable divider separated the proximal third of the arena from the rest, forming a start box. To begin a trial, a rat was placed in the start box, and the divider lifted. (Bottom) Timeline for attentional set shifting procedure.