title: Evaluation of the effect of visual stimulation on humans by simultaneous experiment with multiple subjects.
abstract: To evaluate the biological effects of visual stimulation on multiple subjects watching a same image, a more compact and low-cost device measuring both ECG and photo-plethysmogram was developed. On the basis of these physiological parameters, the maximum cross-correlation coefficient, &#961;<inf>max</inf>, from pulse wave transmission time to heart rate could be calculated. This index reflects the activity of the autonomic nervous system and is considered as a good index for evaluating the effect of visual stimulation on humans. The result of simultaneous experiment with 6 subjects watching a video image taken by an intentionally swaying handy camera has shown that &#961;<inf>max</inf>of almost all subjects decreased in the latter part of the video image and that &#961;<inf>max</inf>of the subjects who felt motion sickness strongly decreased after watching the video image at a time.
authors.affiliation: Department of Electrical and Communication,Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan (e-mail: sugita@yoshizawa.ecei.tohoku.ac.jp).
authors.forename: Norihiro
authors.initials: N
authors.lastname: Sugita
authors.forename: Makoto
authors.initials: M
authors.lastname: Yoshizawa
authors.forename: Akira
authors.initials: A
authors.lastname: Tanaka
authors.forename: Ken-Ichi
authors.initials: K
authors.lastname: Abe
authors.forename: Shigeru
authors.initials: S
authors.lastname: Chiba
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Yambe
authors.forename: Shin-Ichi
authors.initials: S
authors.lastname: Nitta