Basic research into the environmental conditions necessary to develop a sympathetic skin response in

1
title
Basic Research of input support device by using
a sympathetic skin response

• Chikamune Wada and Fumihiko Masuda
• Graduate School of Life Science and Systems
  Engineering
• Kyushu Institute of Technology

2
Introduction
Most switches Require residual motor function
Hitachi, Ltd.

Progressive diseases (ex. ALS) require device
modifications
Our method Doesnt require residual motor
function
3
Sympathetic Skin Response(SSR)

• reflects the activity of the sympthetic
• nervous system
• is affected by cognitive thinking and
• decision making
• does not depend on residual motor function

Sound
Temperature
Light
Respiration
Emotion
SSR
4
SSR signal
Reference
Detective
Common
5
Measurement setup
Subjects 4 non-disabled
Visual stimulation 1. Screen color 2.
Character size 3. Character shape
6
Screen color experimental procedure
1.5 sec
1.5 sec
1.5 sec
Time
30 times for each color, random
30-40 sec
Subjective isoluminance condition
Isoluminance condition
Subjects viewing the image on the screen
7
Screen color results
total number of times SSR signals were detected
total number of times colors were presented
Condition to display characters - Subjective
isoluminance - Any color
Color minimal influence Luminance significant
influence
8
Character size and shape
experimental procedure
30-40 sec
20 times for each size random
Time
1.5 sec
?(ex. ?) ?(ex. ?) ?(ex. ?)
Time
1.5 sec
Subjects viewing the image on the screen
9
Character size and shape results
Screen size 1024 x 768 pixels
Condition to display characters - Any size -
All shape of characters
Size minimal influence Shape minimal influence
10
Confirmation experiment procedure
30 times
46 kana(Japanese character) Subjects 4
non-disabled 5 ALS patients
Kana display condition - Subjective
isoluminance - Yellow kanaBlack background
11
Confirmation experiment results
12
Confirmation experiment results
total number of times SSR signals were detected
total number of times kana were presented
The SSR/kana stimulation appearance ratio
ALS patients
Non-disalbed
13
Conclusion

• Display luminance should be adjusted
• subjectively
• Little influence of character size and shape on
  the SSR
• There is a possible of choosing character(kana)
  by using SSR for ALS patients

• Future work Research the influence of sound and
  emotion on SSR and eventually develop an SSR
  input assisting device.