Pigeons may not use dual coding in the radial maze analog task.

Pigeons may not use dual coding in the radial maze analog task.

Using a radial maze analog task, T. R. Zentall, J. N. Steirn, and P. Jackson-Smith (1990) found evidence that when a delay was interpolated early in a trial, pigeons coded locations retrospectively, but when the delay was interpolated late in the trial, they coded locations prospectively (support for a dual coding hypothesis). In Experiment 1 of the present study, the authors replicated the ori...

Flexible Coding Strategies in Pigeons: Retrospective and Prospective Coding Using a Radial Maze Analog Task

OF DISSERTATION

Radial Maze Analog for Pigeons: Evidence for Flexible Coding Strategies May Result from Faulty Assumptions.

Previous research with the radial maze has found evidence that rats can remember both places that they have already been (retrospective coding) and places they have yet to visit (prospective coding; Cook, Brown, & Riley, 1985). Such dual coding also has been found in pigeons using a radial maze analog in which insertion of a delay at different points during a trial affects performance different...

Spatial memory in pigeons on a four-arm radial maze.

Intra-amygdala infusions of scopolamine impair performance on a conditioned place preference task but not a spatial radial maze task.

Lesions of the amygdala impair performance on a conditioned place preference (CPP) but not a spatial radial maze task. The role of cholinergic receptors within the amygdala in performance of these tasks was evaluated using intra-amygdala injections of the muscarinic receptor antagonist, scopolamine. Food deprived rats were trained on a CPP task, which consisted of four training trials on two ar...