Brain activity feature amount extraction method

A brain activity feature amount extraction method, comprising:

• giving an assignment for triggering brain activity to a subject including a group of healthy persons and a group of non-healthy persons;
• measuring a change in a cerebral blood flow rate for each measurement region of the subject when the assignment is given to the subject;
• acquiring a feature amount relating to the change in the cerebral blood flow rate;
• calculating an index value serving as an index indicating effectiveness or non-effectiveness for discriminating the group of healthy persons and the group of non-healthy persons from each other with respect to a set of the assignment, the measurement region, and the feature amount;
• acquiring a plurality of data items in which the set of the assignment, the measurement region, and the feature amount is associated with the calculated index value;
• acquiring a combination of the plurality of data items in order of higher effectiveness for discriminating whether the subject is a healthy person or a non-healthy person, among the plurality of data items on the basis of the calculated index value;
• and
• displaying the combination of the plurality of acquired data items in order of higher effectiveness.