The DMTP task assesses a rat’s ability to retain, over various delays, information about where it recently found the hidden platform, on a single occasion. During the sample phase of each trial, the rat searches for and finds the hidden platform. After a delay, the rat is returned to the pool and allowed to find the platform again in the same location. Decreased escape latency from the first swim to the second swim reflects the extent to which the rat remembers the platform location. The location of the platform, and thus the correct place information, changes on each trail. This task places a heavy demand on working-memory.