STIMULUS PRESENTATION SYSTEM

• US 20150141865A1
• Filed: 06/15/2012
• Published: 05/21/2015
• Est. Priority Date: 06/15/2012
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Nakajima, Akiko, Sato, Hiroki, Katsura, Takushige, Atsumori, Hirokazu, Funane, Tsukasa
• Granted Patent: US 9,888,874 B2
• Time in Patent Office: Days
• US Class Current: 600/558
• CPC Class Codes: A61B 5/0075 by spectroscopy, i.e. measuring spectra, e.g. Raman spectroscopy, infrared absorption spectroscopy A61B5/0071 takes precedence
• CPC Class Codes: A61B 5/162 Testing reaction times
• CPC Class Codes: A61B 5/163 by tracking eye movement, gaze, or pupil change
• CPC Class Codes: A61B 5/168 Evaluating attention deficit, hyperactivity
• CPC Class Codes: A61B 5/6803 Head-worn items, e.g. helmets, masks, headphones or goggles
• CPC Class Codes: A61M 2021/0027 by the hearing sense
• CPC Class Codes: A61M 2021/005 images, e.g. video
• CPC Class Codes: A61M 21/00 Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis
• CPC Class Codes: A61M 2205/3306 Optical measuring means
• CPC Class Codes: A61M 2205/50 with microprocessors or computers
• CPC Class Codes: A61M 2230/10 Electroencephalographic signals
• CPC Class Codes: A61M 2230/62 Posture
• CPC Class Codes: A61M 2230/63 Motion, e.g. physical activity

Abstract

The present invention provides a stimulus presentation system which determines a mental state and changes presentation contents of a problem based on the determined mental state. The system determines the mental state by measuring gaze and cerebral function of a user, and changes presentation contents of a problem based on the determined mental state.

Claims

1. A stimulus presentation system comprising:

a user setting portion that measures the reference state of a user;

a user measurement portion that obtains gaze information and cerebral function information about the user;

a signal analysis portion that analyzes signals of the gaze information and the cerebral function information;

a user determination portion that determines a mental state based on the analyzed signals;

a presentation content conversion portion that changes presentation contents of a problem based on the determined mental state;

a display control portion that displays the analyzed signals and the determined mental state; and

a storage portion that stores the presentation contents converted by means for converting presentation contents, a predetermined measurement item for determining the mental state, and user information.

2. The stimulus presentation system according to claim 1,

wherein the signal analysis portion corrects a time lag between the gaze information and the cerebral function information from the point in time when a stimulus is given to a subject.

3. The stimulus presentation system according to claim 1,

wherein the user setting portion selects measurement data of cerebral function relative to the stimulus based on data-effective conditions.

4. The stimulus presentation system according to claim 1,

wherein the user determination portion determines the mental state from results of the gaze information and the cerebral function information about the subject, based on Reversal Theory.

5. The stimulus presentation system according to claim 1,

wherein the presentation content conversion portion selects items for converting presentation contents of a problem, based on the determined mental state.

6. The stimulus presentation system according to claim 1,

wherein the presentation content conversion portion creates a time table of measurement items of the subject, based on information obtained from the signal analysis portion or the user determination portion.

7. The stimulus presentation system according to claim 1,

wherein the presentation content conversion portion creates a time table of presentation content conversion for a subject, based on information obtained from the signal analysis portion or the user determination portion.

8. The stimulus presentation system according to claim 1,

wherein the display control portion performs control such that at least one of the information obtained from the signal analysis portion, the information obtained from the user determination portion, and the information obtained from the presentation content conversion portion is displayed.

9. The stimulus presentation system according to claim 1,

wherein the display control portion displays a trend of the mental state, which has been determined by the user determination portion based on the Reversal Theory, in a time-series manner.