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Volume 36, Issue 5
Displaying 1-5 of 5 articles from this issue
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Motonori ISHIBASHI, Tomoyuki YOSHIDA2000 Volume 36 Issue 5 Pages 229-237
Published: October 15, 2000
Released on J-STAGE: March 12, 2010
JOURNAL FREE ACCESSCharacteristic changes in background EEG with the variation in reaction time were investigat ed. In the experiment, visual stimuli to proactively reduce the arousal level were presented repeatedly (5min.), followed by the presentation of repeated visual stimuli (15 times) to which the subjects were required to respond. These consecutive presentations (1 session) were repeated four times. From analysis of the seven subjects in whom the alpha waves were clearly observed, when comparing the final session with the first, results indicated a decrease in the subjective rating scores of “consciousness” and “concentration”, an increase in “fatigue”, and delay in reaction time, thereby suggesting a difference in the subjective and behavioral arousal level between sessions. Then, from comparison of these sessions, as a result of the analysis of EEG prior to the response demand stimulus, the peak frequency in alpha wave band decreased in the parietal region, and the theta 2 and alphal band power increased over nearly the entire scalp region, in the reaction time delay session. Moreover, the frequency fluctuation in alpha wave band tended to disappear. In conclusion, these characteristics of EEG provide clues to develop a simple and objective method for evaluating the arousal level in future.View full abstractDownload PDF (3882K) -
Hirotaka AOKI, Kenji ITOH2000 Volume 36 Issue 5 Pages 239-253
Published: October 15, 2000
Released on J-STAGE: March 12, 2010
JOURNAL FREE ACCESSIn this study, a method for analyzing subjects' cognitive attitudes to commercial films (CF's) is proposed. This method is based on a scenario description, which indicates the amount of product information as well as the time line of the scenes and objects displayed in the CF, in combination with eye-tracking data. Two attitudinal measurements are defined on the basis of subjects' eye-tracking data, i.e., effective gaze ratio and product perception ratio. The effective gaze ratio is related to how intensively a subject watches the CF, while the product perception ratio exhibits how much of the subject's gaze is directed towards messages or claims regarding an advertised product. A series of experiments was carried out to obtain subjects'eye-tracking data. Applying the proposed method to the data, we analyzed the subjects' cognitive attitudes. From this analysis, we identified some influences of subjects' attributes such as subjects' preferences toward advertised products on cognitive attitudes. We also obtained some relationships between cognitive attitudes and CF's design parameters such as scene change frequency. Based on these results, we discuss some implications for designing effective CF's.View full abstractDownload PDF (8372K) -
Comparison between two cases of whole-body and local hot shower stimuliShizuma YAMAGUCHI, Tetsuro SAEKI, Makoto NAKAMURA, Kenji FUJII2000 Volume 36 Issue 5 Pages 255-260
Published: October 15, 2000
Released on J-STAGE: March 12, 2010
JOURNAL FREE ACCESSDownload PDF (621K) -
Akihiro KAWATA, Ichiro FUKUMOTO2000 Volume 36 Issue 5 Pages 261-272
Published: October 15, 2000
Released on J-STAGE: March 12, 2010
JOURNAL FREE ACCESSIn order to study features of auditory alarms suitable for both young adults and the elderly, the following four auditory alarms were designed and tested: (1) a 2kHz pure tone; (2) an amplitude-modulated tone composed of the product of 2kHz and 2.5kHz sinusoidal signals; (3) a frequency sweep tone from 3kHz to 0.5kHz; (4) a frequency sweep tone from 0.2kHz to 2.7kHz. The audibility of these alarms was examined in terms of the reaction time. Impressions of the urgency of these alarms were also evaluated. There were significant differences in impressions of urgency for alarms (3) and (4) between male and female subjects, and between young and elderly subjects. In view of the overall evaluation of reaction time and impression analysis, alarm (2) is considered the best. The experimental results suggest that a complex, frequency-changing sound would be most effective in creating auditory alarms suitable for both young adults and the elderly.View full abstractDownload PDF (1407K) -
Kenji FUJII, Etsuhiro KIMURA, Makoto NAKAMURA2000 Volume 36 Issue 5 Pages 273-278
Published: October 15, 2000
Released on J-STAGE: March 12, 2010
JOURNAL FREE ACCESSThis study describes a safe and comfortable showering system developed for the handicapped. The subjects were seven males from 42 to 58 years old. Rectal and skin temperatures, blood pressure and heart rate were measured, and subjective responses were also measured. They took a shower at several water temperatures and flow rates. Test results were best with 41°C water temperature, a flow rate of 1L/nozzle, and a showering time of 8 minutes. Heart rate, while varying by age, proved the best indicator of subject comfort and safety. A trial product was developed using these test results.View full abstractDownload PDF (2373K)
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