Rats' Sensitivity to Their Direction of Movement and Spontaneous Alternation Behaviour

The response of rats to their prior direction of movement was examined in three spontaneous alternation experiments. In the first, a straight alley run interpolated between two T-maze trials increased goal arm alternation when it was in the same direction as that of the animal's first T-maze goal arm entry and decreased the alternation tendency when it was in the opposite direction. Experiment II found that multiple runs in one direction in a straight alley increased the likelihood that rats would subsequently enter the goal arm of a T-maze which permitted movement in an opposite direction. In the third experiment, rats entered those goal arms of an eight-arm radial maze which permitted movement in any direction which was different from that during a preceding straight alley trial. The results of these experiments indicate that rats are quite sensitive to their direction of movement and use it as a cue in guiding their behaviour in a variety of experimental situations.