System That Measures Different States of a Subject

An analysis system that analyzes a state of a person, the analysis system comprising:

• a terminal configured to be worn on the person's body, the terminal including:
• an acceleration sensor that measures the acceleration of motion of the body;
• and
• a processing unit that calculates a first mental index that is an index showing a brain state of the person in a first time period and a second mental index that is an index showing the brain state of the person in a second time period on the basis of the time-series data of the acceleration,
• wherein the processing unit quantifies an influence exerted on the brain state of the person by sensor information regarding the behavior of the person or regarding circumstances in which the person resides on the basis of the first and the second mental indexes, a first value of the sensor information in the first time period and a second value of the sensor information in the second time period.