National Institute of Information and Communications Technology, Incorporated

Yasufumi Kuroda

Hideo Eda

Takanori Maesako

Katsuo Sugai

A body activity measurement device is provided with a light irradiation unit that irradiates near infrared light of a specified wavelength on a specified measurement site of a brain of a subject; a light detector that detects the intensity of the light exiting from the measurement site; a light absorbance data generator that from the time sequence changes of the intensity of the exiting light generates light absorbance time sequence data suggesting the changes in the concentration of oxyHb, deoxyHb and totalHb; and multiple baseline correction units that correct baselines that mutually differ in relation to the light absorbance time sequence data obtained when the subject performs specified assignments; and configured such that the baseline correction of the light absorbance time sequence data can be conducted using the baseline correction units corresponding to the assignment performed by the subject.

Body activity measurement device

In order to offer a new and useful device in being able to objectively assess the psychological state when a subject performs an assignment, a psychological state assessment device is configured to irradiate a specified measurement site in the brain of a subject with near infrared light of a specified wavelength, to obtain time change data indicating time change data for the amount of blood and/or amount of blood components respectively while performing a task and while at rest, and to assess the psychological state of the subject while performing the assignment based on time change data during the rest period in comparison with time change data while performing the task.

Psychological state assessment device, psychological state assessment method

The present claimed invention intends to provide a simple and superior means that is possible to express a tendency or a characteristic of a learner as scientific data by making use of a fact that a blood amount or/and a blood component amount in a predetermined region of brains causes a characteristic change when a learner acquires strategy to solve a work during a process of solving the work and that is effective for developing a new educational method from the scientific data. In case a subject conducts a predetermined work, a blood amount or/and a blood component amount in a predetermined measuring region of brains of the subject is measured chronologically by the use of a near-infrared spectroscopy, time change data as data showing time change of the blood amount or/and the blood component amount is produced and a state of strategy acquisition to solve the work for the subject is determined based on the time change data.

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Tokyo, Japan

Yasufumi Kuroda