To improve an inefficient method for observation such as continuous observation of an epileptic generalized convulsive behavior unknown about the time when the behavior is exhibited over a long period and to shorten the time consumed in developing, e.g. an antiepileptic agent and reduce the development cost by the improvement.

Acoustic irritation and mechanical vibration irritation are applied to an animal of the object of observation housed in a cage to thereby induce an epileptic generalized convulsive behavior of the animal. Vibration is recorded and the behavior is analyzed only in a time for applying the acoustic irritation and/or mechanical vibration irritation in the animal subjected to the priming conditioning.