The time of perception as a measure of differences in sensations Volume 8

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1906 Excerpt: ...by observation is inexact and vague, and it is furthermore doubtful whether we can ever make such a comparison at all. The writer attempted to make such comparisons with the combinations of colors before the reactions were taken, in order to compare such estimates with the reaction.times. He found it wellnigh impossible to do this. The introspective evidence did not warrant the belief that the difference between red and green and red and blue would be as marked as it is. To return to a consideration of results. The time of reaction to blue and yellow is shorter for H than to red and green. With subject S, the differences are about the same, but in his case the difference between red and green appears to be most readily perceived. The differences are small and may be due to chance. In general, at least as far as these subjects are concerned, the time of discrimination is about the same for red and green as for blue and yellow. The colors, it may be stated, are not complementary, though it would have been desirable to have them so. It was not thought necessary to cope with the difficulty of getting pigments or mixtures where this would have been the case for experiments such as these. The differences between these two combinations and red and blue and green and yellow are marked in both subjects. It should be expected from the position of red and blue in the color scale that the differences here would have been quite as great as in the case of red or green, or greater. Why this is not so it is difficult to say. It is hardly necessary to state that the colors were in each case rich, saturated colors. There is, however, the normal difference in brightness, and as in the previous experiments it is the opinion of the writer that the differences in the time of per...