Figure 2.

T-maze spatial alternation task. Schematic of the test protocols for the forced-choice alternation task run in a single maze. Solid lines indicate the sample phase. Dashed lines indicate the correct response in the choice phase. Food rewards were located in wells at the end of the arms. A, Standard trials permitted the use of multiple cue types. B, The task was modified to nullify the value of intramaze cues by rotating the apparatus either 90° or 180° between the sample phase and choice phase. The numbers indicate the arm identity. B, Illustration of a trial in which the maze was rotated 180° between the sample phase and choice phase.