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Positive contrast polarity slows the performance of older individuals but does not seem to systematically influence the performance of younger adults. As mentioned above, normal changes in contrast sensitivity reduce the capacity of older adults to perform visual tasks in comparison to younger adults. Additional changes may explain the age-related effect of polarity: older adults also develop an increased sensitivity to glare and refracted light. Thus, when presented with visual stimuli which produce glaring or glowing effects, older adults will show less efficient processing than younger adults. Because of the "glowing" effect produced by halation, positive contrast is prone to produce the precise conditions under which older individuals are visually disadvantaged.
However, it would appear that black text presented on a white background is the best choice for most users. When considering the needs of individual users, it is important to realize that older users have a much narrower range of visual function, and that this acts to reduce readability under contrast conditions which pose no difficulty to younger users. Of additional practical concern is that readability of text is significantly slower for all viewers when presented with medium-high contrast than when presented with high contrast, and the medium-high contrast level is used as the default setting for at least one popular web browser.
Originally posted by TrueAmerican
But further, studies also suggest that black text on a white background has the highest searchability, intelligibility, and is read with the fastest speed- and most importantly- among all age groups.
Originally posted by TrueAmerican
Basing the site around a black background is going to cause problems, simply due to its forcing a positive polarity, and thereby causing difficulty for older viewers. But hey, who needs us pesky old timers around here anyways. Coulda sworn you were over forty there, Springer. Interesting that you like it so much.
Originally posted by Majic
The research is fascinating, but I do tend to think the question is moot.
Originally posted by Majic
I'm well past forty myself, and I love it.
Originally posted by Jbird
Originally posted by Majic
I'm well past forty myself, and I love it.
Ha, ha. He said old, M a j i c.
40.....those were the days.
Plus he forgot about us 'actual' old gyee's, with light sensative eyes, that
have to wear at nite, who see the monitor as a 3000W parking lot light, shining
in our face.
Guess they missed me in that survey.
I'm lovin' the darkest setting , myself.