“The White Rat and the Maze Problem: 1. The Introduction of a Visual Control”, 1915 (; backlinks):
Investigated the behavior of the rat in forming the maze association. An attempt was made to introduce visual control in the maze, to study the ability of rats to use vision in an exact way. The maze used for the investigation was the modified Hampton Court Maze. The stimulus to the activity was the reward of food at the completion of a successful run in the maze or the choice of the right exit in the problem box. 5 animals constituted a group.
The experiments conducted comprised of 3 records: (1) normal maze records (2) black-white maze records, true path black (3) black-white maze records, true path white. Results were interpreted in terms of speed, accuracy, and effect of brightness.
Concludes that if animals were given 2 contrasting paths side by side, differing in brightness, one path proved more dominant, favored accuracy and shorter time for completion in the early trials.