Abstract
This paper constructs a model which infers and expresses the degree of laugh resulting from a funny story. A psychological model analyzing the degree of laugh and fuzzy theory are applied to the presented model. The degree of laugh is expressed by the use of facial and liguistic expressions. The pleasure of surroudings, the degree ofmental strain, amusement of the story and the degree of feelings resulting from the story are considered as inputs of the model. They are expressed by linguistic terms. First of all, an initial face is obtained by the use of the fuzzy reasoning technique from the pleasure and the strain. The face is expressed together with linguistic terms. Next, the condition of laugh is obtained by the use of degrees of unconstrained state of mind and mental strain. The degree of uncostrained state of mind is estimated from the pleasure of surroundings and the degree of feelings resulting from the story. The degree of laugh and that of superiority laugh are estimated by the use of the fuzzy reasoning technique and expressed by facial expressons and linguistic terms. Finally some questionnaires are performed in order to evaluate the presented model.