“The White Rat and the Maze Problem: 2. The Introduction of an Olfactory Control”, 1915 (; backlinks):
Investigated whether an olfactory control could be introduced into the learning of the maze, and if it could be, to discover how it would affect the learning process as compared with other forms of control. The modified Hampton Court maze was used with young untrained white lab rats.
A series of 3 experiments was carried out: (1) an olfactory trail was laid in the true path in the maze (2) the trail was laid in cul de sacs (3) the transfer of training after Experiments 1 & 2 were measured and (4) discrimination test for Experiment 2 was done to study if another transfer had occurred.
Results: show that though rats do not usually follow a path in the maze by means of a scent, in these experiments, they could do so. There is also evidence against the statement that olfactory sensations have no role in the selection of the proper turns in the maze (J. B. Watson). Further, the results have provided proof of transfer of training.