Figure 4.

(Top) Animals were trained to locate a hidden platform submerged below the surface in a tank of water. Illustrated is the latency to locate the hidden platform recorded across each of 11 training trials. Brackets indicate standard error. (Middle) The accuracy (distance traveled/optimal distance) with which the animals located the hidden platform is plotted for the first, fourth, seventh, and tenth training trials. Brackets indicate standard error. (Bottom) After the 11th training trial, animals were returned to their home cages for 3 h and were then administered a 30-sec “probe” trial in which the escape platform was removed from the maze and the percent of time spent searching in the target quadrant was recorded. The mean time in the target quadrant is depicted. Brackets indicate standard error.