“The White Rat and the Maze Problem: 3. The Introduction of a Tactile Control”, 1915-05 (; backlinks):
Attempts were made to show how tactile elements entered into and modified the maze reactions in white lab rats. The method employed in testing tactile control was such that the tactile functioning of feet and vibrissae could be observed, and such functioning would be a necessary part of the learning process.
The Hampton Court maze has been compared with the X-mazes used in the present study, so that results obtained could be compared with the studies of the introduction of vision and olfaction in similar experiments with rats. Another maze, called Y-maze was also used which is a slight modification of the X-maze. Experiments were carried out on both the mazes.
Results: indicate that, given conditions which favored or necessitated the use of vibrissae, or the tactile use of nose or feet, the maze habit was not more quickly established, but that during the setting up of the habit, fewer errors were made, which lessened the time per trial.