Method for predicting arousal level and arousal level prediction apparatus

A method for predicting an arousal level used by a computer of an arousal level prediction apparatus that predicts an arousal level of a user, the method comprising:

• obtaining, by a processor of the computer, current biological information regarding the user detected by a first sensor;
• calculating, by the processor, a current arousal level of the user based on the current biological information;
• obtaining, by the processor, current environment information indicating a current environment around the user;
• predicting, by the processor, a future arousal level, which is an arousal level a certain period of time later, based on the current arousal level and the current environment information;
• and
• (i) issuing, by the processor, a notification to the user or (ii) controlling, by the processor, another device, based on the future arousal level,
• wherein the biological information includes information indicating a body surface temperature of a periphery of a person's body and a deep-body temperature, and
• wherein the future arousal level becomes lower as a current body surface temperature of a periphery of the user's body becomes closer to the deep-body temperature.