Restudy on resolution range of flicker frequency of photic stimulation

• Published in: Ningen kogaku. The Japanese journal of ergonomics Vol. 32; no. 4; pp. 167 - 173
• Main Authors: HAYASHI, Yoshio, TAKEDA, Masaharu, SUZUKI, Kaoru
• Format: Journal Article
• Language: English
• Published: Japan Ergonomics Society 1996
• ISSN: 0549-4974; 1884-2844
• DOI: 10.5100/jje.32.167

Schwarz, Wintzer, Gebhard, et al. have reported their studies of the frequency discriminating thresholds for flickering lights. However, data on such thresholds as changes in flicker frequencies from 10Hz to a critical fusion frequency involves problems as reference data in view of the advances in measuring instruments and difficulties in statistical processing of the data. This experimental study was conducted by separating two parallel spot of flickering lights into a standard and a variable stimulation by means of computer control. In the experiment, the subjects adjusted the frequencies of variable stimulations to the stipulated frequencies of standard stimulations by operating a handheld control. Six standard stimulations were set between 10 and 35Hz at intervals of 5Hz. Eighteen subjects with normal vision (12 males and 6 females aged 20 to 23 years) took part in the experiment. As a result, the Weber ratio (ΔS/S) was about 4% at 15, 20, 25 and 35Hz. The experimental results of Gebhard et al. could be refconfirmed with more accurate normative data.