An information processing apparatus, portable device or an electronic pet apparatus includes emotion generation means for generating an emotion parameter which simulates an emotion in an artificial manner. This emotion parameter is varied in accordance with a result of voice recognition. The emotion generation means includes a history recording means used for recording a history of at least results of voice recognition and emotion parameters corresponding to results of voice recognition. A change in emotion parameter corresponding to a result of voice recognition is varied in accordance with the history recorded in the history recording means.
Speech input processing with emotion model based response generation