PRESENCE-OF-CONCENTRATION-DEDUCING DEVICE AND CONTENT EVALUATION DEVICE

摘要

The presence-of-concentration-deducing device (110) is equipped with: a cerebral blood flow-acquiring unit (101) that acquires a user's cerebral blood flow; a variation threshold value-acquiring unit (102) that acquires the variation threshold value, which is a smaller value than the user's cerebral blood flow during the base period; and a deducing unit (130), which deduces that the user is concentrating when the cerebral blood flow acquired by the cerebral blood flow-acquiring unit (101) falls below the variation threshold value acquired by the variation threshold value-acquiring unit (102).