Re: Parallax and vestibular disorders

What an interesting post. There is  a different case involving text
customization where sub-pixelation causes severe nausea.

https://www.w3.org/WAI/RD/2012/text-customization/p7.html

It's almost like there should be a forbidden patterns criteria.

Wayne

On Wed, Jul 27, 2016 at 7:50 AM, Alastair Campbell <acampbell@nomensa.com>
wrote:

> Hi everyone,
>
>
>
> This might have been covered somewhere (COGA?), but I couldn’t find it if
> it has.
>
>
>
> Has anyone considered new criteria for people with vestibular type issues?
>
>
>
> It isn’t something I’m expert on, but there’s a good overview here:
>
>
> http://alistapart.com/article/designing-safer-web-animation-for-motion-sensitivity
>
>
>
> The issue that doesn’t seem to be covered is when you scroll a page
> (usually vertically, but sometimes horizontally) and things move at
> different speeds. E.g. the background moves more slowly than the foreground
> to give an impression of depth/distance.
>
>
>
> That can trigger disorientation, nausea and/or loss of balance. When iOS 7
> came out quite a lot of people reported motion sickness [1].
>
>
>
> It is in the same area as 2.2.2 (Pause, Stop, Hide) but that doesn’t cover
> a scrolling based mechanism. (It does mention scrolling, but I read that as
> something that scrolls on its own, not that the animation happens whilst
> the user scrolls the page.)
>
>
>
> You might argue the user is in control, but if they have to scroll to use
> it, they cannot use it (see the examples in the alistapart article above).
>
> As an example (if you don’t have any disorder) try scrolling this page:
> http://www.world-of-swiss.com/en
>
>
>
> You don’t have to use that mechanism, but if you do, whoosh! I’ve brought
> that example up for magnification users before, but it must be terrible for
> people with vestibular issues.
>
>
>
> Off the top of my head an SC could be something like:
>
> 2.x.x User initiated animation:  For animation triggered by a user action
> (such as scrolling) there is a mechanism for the user to pause, stop or
> hide the animation whilst still performing the same action. (Level AA?)
>
>
>
> I think it needs narrowing down, but I wanted to see if it is worth
> proposing or if someone already had?
>
>
>
> Kind regards,
>
>
>
> -Alastair
>
>
>
> 1] A poll at http://www.imore.com/ios-7-and-motion-sickness-poll not
> scientific by any means but that’s quite a lot of people reporting an issue.
>
>
>
> --
>
>
>
> Alastair Campbell
>
>
>
> www.nomensa.com
>
> tel: +44 (0)117 929 7333 / 07970 879 653
>
> follow us: @we_are_nomensa or me: @alastc
>
>
>
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