ISSN 0439-755X
CN 11-1911/B
主办:中国心理学会
   中国科学院心理研究所
出版:科学出版社

心理学报 ›› 1965, Vol. 9 ›› Issue (3): 48-58.

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光坪对相继性闪光信号辨认的影响

李家治 ;焦书兰   

  • 出版日期:1965-09-25 发布日期:1965-09-25
  • 通讯作者: 李家治

EFFECT OF DIM-BRIGHT RATIO ON THE DISCRIMINATION OF SUCCESSIVE FLASH SIGNALS

LI CHIA-CHIH, CHIAO SHU-LAN   

  • Published:1965-09-25 Online:1965-09-25

摘要: <正> 問題 一般闪光都包括亮与黑两个相互交替的吋相。如果在黑时相不是完全黑,而是仍有一定光亮,我们仍能清楚地看到闪光。不过这种闪光所包括的是亮与暗两个时相。我们把暗时相叫作“光坪”,亮时相叫作“光峯”,或简称“坪”与“峯”。光坪的強度是可以改变的,它可以降低到零,这就是一般闪光;也可以增加到和光峯的強度相等,这吋闪光就变成了固定灯光。

关键词: NULL

Abstract: The flash light composed of alternative bright and dim phases was used in simple and choice reaction time experiments to investigate the effect of dim-bright ratio (DBR) on signal discrimination. Experimental results showed that the dim phase of the flash light was a noise factor for the discrimination, but with DBR under 0.40 this effect was negligible, while above 0.70 its influence increased abruptly.With small DBR (0.17), simple reaction time to signals within the frequency range of 40 c/min to 420 c/min remained almost unchanged. When DBR reached 0.83, reaction time to both the lower and higher frequencies was remarkably longer than that to the middle frequencies (100—300 c/min). This was due to the fact that at greater DBR the higher frequencies tended to give rise to flicker fusion, whereas at lower frequencies the subjects needed more stimulus repetitions (i.e. bright and dim alternations) to make correct discriminations.

Key words: NULL