Citation

Bateman RP. Proc. Hum. Factors Ergon. Soc. Annu. Meet. 1980; 24(1): 288-291.

Copyright

(Copyright © 1980, Human Factors and Ergonomics Society, Publisher SAGE Publishing)

DOI

10.1177/107118138002400178

PMID

unavailable

Abstract

The purpose of this investigation was to determine whether or not human perception of two equal flashes of colored light is a function of the interstimulus interval. Thirty subjects with normal color vision were presented with two 5 ms flashes of light, the first at 697 nm (red) and the second at 565 nm (green). The interstimulus interval was varied from 5 to 100 ms. When the interval was less than 30 ms, subjects reported seeing yellow flash. From 30 to 50 ms, subjects reported seeing only a green flash. Above 50 ms, subjects were able to identify two flashes, one red and one green. These results constitute a contradiction of Bloch's Law, which states that for interstimulus intervals less than 70 ms, stimuli are summed to produce perception. The implications of these results on a model for human color vision are discussed.

Language: en