PROBLEM TO BE SOLVED: To enable rich and lively non-verbal communication by displaying emotionally expressive and lively avatars on which expressions of users are reflected in almost real-time.SOLUTION: A wearable terminal device includes a sensor unit 101 having at least either of an electrodermal activity sensor for detecting electric potential at a plurality of points on a human head and an inertial sensor for detecting at least acceleration or angular velocity of a human head an expression estimating unit 103 configured to identify at least one of a plurality of expression elements required to estimate expression on the basis of a detection result of the sensor unit, and estimate movement of the head and/or facial expression from the identified expression element and a display unit 105 configured to render the estimated expression on an avatar together with the estimated movement of the head and display the resultant avatar on a display.SELECTED DRAWING: Figure 1
