----- Original Message ----- From: "Richard Stallman" <[EMAIL PROTECTED]>
> I clearly said in previous postings > that the blinking cursor produced discomfort to me because of > neuro-physiological differences with what presumably is the majority > of people. > > I believe you. > > What we should do depends on how common this condition is. What > fraction of users react this way? Is it 10%? 1%? .01%? > > Maybe someone can find something in the user interface literature > which reports on this. I know nothing about this particular matter, but it may be more common than one expects. In a well controlled study of flourescent lighting it turned out that about 25% of the population could be sensitive to that sort of blinking. The study results showed increased headaches, stomach problems etc. The blinking in this case is however invisible (around 100Hz) and the magnitude only around 50%. (High frequency flourescent lighting was used for comparision in this double blind study. This is around 30kHz and maybe a few % in magnitude - if I remember correctly.) Of course blinking light has a more overall impact on your eyes and brain. So you can not compare directly. It seemed in that case however that young people (with maybe faster neurology) had most difficulties with the blinking light. _______________________________________________ Emacs-devel mailing list Emacs-devel@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-devel
