Stimulus presentation system

• US 9,888,874 B2
• Filed: 06/15/2012
• Issued: 02/13/2018
• 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
• Primary Examiner(s): Stout, Michael C
• Application Number:
  US14/407,556
• Publication Number:
  US 20150141865A1
• Time in Patent Office: 2,069 Days
• 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 monitor to display information to a user;

a first instrument to measure a gaze of the user including an amount of eye blinking and a variance in gazing time;

a second instrument to measure cerebral activity of the user including;

an arithmetic unit connected to the display, the first instrument, the second instrument, and which is configured to;

measure a reference state of the user based on a first measured gaze and a first cerebral activity of the user when a stimulus is displayed on the monitor to the user and when one or more measurement conditions are satisfied;

obtain a second measured gaze and a second measured cerebral activity of the user when a presentation content including a problem is displayed on the monitor to the user;

analyze the second measured gaze and the second measured cerebral activity;

determine a mental state of the user based on the analysis of the second measured gaze and the second measured cerebral activity;

cause one or more predetermined changes to the display of the presentation content on the monitor to the user based on the determined mental state; and

display the presentation content including the changes thereto, the second measured gaze, the second measured cerebral activity, and the determined mental state in a time-series manner,

wherein the first measured gaze includes a first amount of eye blinking and a first variance in gazing time,

wherein the second measured gaze includes a second amount of eye blinking and a second variance in gazing time, and

wherein the mental state is determined from results of the second measured gaze, the second measured cerebral activity and the reference state based on Reversal Theory.

2. The stimulus presentation system according to claim 1,

wherein the arithmetic unit is further configured to:

correct a time lag between the first measured gaze and the first measured cerebral activity information from the point in time when the stimulus is presented to the user.

3. The stimulus presentation system according to claim 1,

wherein the arithmetic unit is further configured to:

select 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 arithmetic unit is further configured to:

select items for changing the presentation contents of the problem based on the determined mental state.

5. The stimulus presentation system according to claim 1,

wherein the arithmetic unit is further configured to:

create a time table of measurement items of the user based on the analysis of the second measured gaze and the second measured cerebral activity.

6. The stimulus presentation system according to claim 1,

wherein the arithmetic unit is further configured to:

create a time table of presentation content conversion for the user based on the second measured gaze and the second measured cerebral activity.

7. The stimulus presentation system according to claim 1,

wherein the arithmetic unit is further configured to:

display a slider bar for altering at least one of the second measured gaze, the second measured cerebral activity, the determined mental state, and the presentation content including the changes thereto.

8. The stimulus presentation system according to claim 1,

wherein the arithmetic unit is further configured to:

display a trend of the determined mental state which has been determined based on Reversal Theory in a time-series manner.