The tendency for a rat spontaneous^ to vary his behavior in an apparatus was investigated in problems where alternation between 2 pathways was possible. Each pathway led to food and the experimenter did not impose any eet pattern upon the animal as is done in delayed reaction expts. Elevated pathways of block design were used. The % of alternation in a simple apparatus was first detd. and then changes in the length of pathway required to reach food, or changes in the number of square units arranged in tandem, were made and changes in the behavior of the rats noted. The evidence favors the following conclusions: A choice of pathways will influence a later choice at the same choice point, even though an interval of as much as one minute occurs between the trials. The 2d choice at a given choice point will be influenced even though another choice at another part of the apparatus has intervened. The choice at one point in an apparatus does not seem to affect a choice at another part of the apparatus. It appears that without training a rat will respond to a choice situation in part on the basis of its preceding activity.