Abstract
Using the method of discrimination learning, the reported experiments investigated variations in the minimum discriminable time (M.D.T.) attended on the detention location in the maze. Detentions at the middle of path, near the start and near the goal were studied in relation to their effects on the M.D.T. It was found that the M.D.T. recorded when the detention-rooms were located near the startpoint or near the goal shifted progressively, as compared with the M.D.T. obtained when they were located at the mid-points. However, the difference between the M.D.T. near the startpoint and that near the goal was not always significant. When two detention-rooms were located in each pathway, near the startpoint and near the goal, and when the relation between the longer detention-period and the shorter was reversed in one of the paths, the animals did not show a greater preference for either. In this latter experiment, however, only three subjects were employed and it would desirable to initiate further study with an adequate number of subjects.
Special acknowledgement is due to Miss M. Taniguchi and Miss K. Kosaka for their persevering assistance in these experiments.
