Abstract
A) When a rabbit is set free in a strange place, his behavior is not at random, but has a certain behavioral pattern in its place. The behavioral pattern in this case is as follows : 1) At first he settles his provisional shelter (the settlement of the dynamic center of his behavior). 2) He carefully makes radial movements with the provisional shelter as its center, and then he moves about it in a considerably unrestrained way. 3) He walks and runs around its region many times (the reinforcement of his cognition of his explored region). 4) He rests in the shelter for a while. 5) He leaves off his timid behavior which he has been taking up to that time and assumes a completely changed action to settle his true shelter (insight behavior).
B) The stranger set free in a strange place is aggressed by the former residents. The stranger is defeated at once and runs about trying to escape, but even then the behavioral pattern mentioned above is not changed by their violent aggressions. At first he explores his strange place in order to get his psychological stability. When he cannot finish his exploring behavior, it is usual that he, without psychological stability; is defeated by the aggressive former residents. But on the other hand, when a rabbit, even if it has been a strange place for him, invades it on his own initiative exploration, or when he is set free in the place he has already known, he fights against the former residents. It is observed that one of the factors deciding the dominance subordination relation depends upon whether a rabbit has already finished his exploring behavior and obtained his psychological stability in his life field or not.
