Re: WCAG Silver Harm from motion Subgroup, week 2 meeting, July 31 at 9am EDT

Dear wcag3-motion and all interested AGWG members,

Due to permission issue, I can not edit or comment on Google Docs
scratchpad yet. Since we only have 15min (max) to review existing materials
during the next meeting, I'd like to share some of my thoughts and
additional materials/resources prior to it.

Note: I use markdown syntax in this mail.

1. "COGA info for WCAG 3 sprint teams" document (only) lists distractions
as harm from on-screen motion. Please note the context of that document is
for people with cognitive and learning disabilities. Vestibular disorders
are not covered in that document.

2. The ALA article "Designing Safer Web Animation For Motion Sensitivity"
mentioned in "Animation caused by user interaction" wiki page provides some
basic yet important, and easy-to-understand for designers, information on
content animation which might cause harm.

3. Later, another ALA article "[Accessibility for Vestibular Disorders: How
My Temporary Disability Changed My Perspective](
https://alistapart.com/article/accessibility-for-vestibular/)" echos the
previous one, with valuable information such as `background-attachment:
fixed` can cause harm too.

4. Vestibular Disorders Association (VeDA) describe how human balance
system works in its article "[Visually Induced Dizziness – “Supermarket
Syndrome”](
https://vestibular.org/article/coping-support/living-with-a-vestibular-disorder/visually-induced-dizziness-supermarket-syndrome/)"
to common readers in an easy-to-understand way.

That article lists several symptoms of visually induced dizziness, such as:
dizziness, unsteadiness, light-headedness, disorientation, nausea,
vomiting, sweating, salivation (mouth watering), tiredness, and turning
pale.

5. A medical paper "[Vertigo and dizziness from environmental motion:
visual vertigo, motion sickness, and drivers' disorientation](
https://pubmed.ncbi.nlm.nih.gov/24057825/)" covers visual vertigo and
motion sickness.

6. The Committee for Classification of Vestibular Disorders of the Bárány
Society is promoting development of an implementable classification of
vestibular disorders and published several consensus documents.
"[Classification of vestibular symptoms: Towards an international
classification of vestibular disorders](
https://content.iospress.com/articles/journal-of-vestibular-research/ves00343)"
contains International Classification of Vestibular Disorders I (ICVD-I) as
an appendix.

Note: another reference: [Overview of the International Classification of
Vestibular Disorders](https://pubmed.ncbi.nlm.nih.gov/26231270/)

I believe that the triggered vertigo/dizziness, especially visually-induced
ones triggered by a complex, distorted, large field or moving visual
stimulus, are highly related to the wcag3-motion subgroup.

We should notice that ICVD distinguished visually-induced vertigo/dizziness
from motion sickness, in which the predominant symptom is a lasting,
visceral feeling of nausea.

Other kinds of triggered vertigo/dizziness may also relate to **motion**:
positional (motion of human body), head-motion (motion of human head),
sound-induced (motion of sound transmitting medium/particle), and
orthostatic (motion of human body). I feel maybe these should be excluded.

7. Another ICVD consensus document "[Motion sickness diagnostic criteria:
Consensus Document of the Classification Committee of the Bárány Society](
https://content.iospress.com/articles/journal-of-vestibular-research/ves200005)"
presents diagnostic criteria and clinical features for motion sickness,
visually induced motion sickness (VIMS), motion sickness disorder (MSD),
and VIMS disorder (VIMSD).

Hope these external resources help us determine the user stories and
functional needs we intend to cover in the upcoming meetings. Looking
forward to meeting with you on Monday!

Best,
/Jedi/


Rain Michaels <rainb@google.com> 於 2023年7月28日 週五 上午6:17寫道：

> Dear AGWG,
>
> The *Harm from motion Subgroup* will have our second meeting, week 2, on *Monday,
> July 31 at 9am ETD*. Please note that this is a new time, 1 hour later
> than the original time.
>
> *Agenda
> <https://docs.google.com/document/d/1jCOE4cO68V-QUiZEhJNkrQydNmW71ljaCGGu2Zmnlok/edit#heading=h.ioq7wpm4uu88>:*
>
>    - Review existing materials
>    - Define user stories and functional needs
>    - Determine next steps
>
> *Prework: *
>
>    - Review and familiarize yourself with prior work
>    <https://docs.google.com/document/d/1jCOE4cO68V-QUiZEhJNkrQydNmW71ljaCGGu2Zmnlok/edit#heading=h.pcf8pwuyo3b>
>    - Document (draft) any user stories or functional needs
>    <https://docs.google.com/document/d/1jCOE4cO68V-QUiZEhJNkrQydNmW71ljaCGGu2Zmnlok/edit#heading=h.xia1ysye3sdj>
>    that come to mind or are present in the prior work
>    - Sign up to scribe
>    <https://docs.google.com/document/d/1jCOE4cO68V-QUiZEhJNkrQydNmW71ljaCGGu2Zmnlok/edit#heading=h.9hlhmphxrbki>
>    on our scratch pad
>
> *Meeting details: *
>
>    - Local meeting time:
>    https://www.timeanddate.com/worldclock/fixedtime.html?iso=20230724T09&p1=43
>
>    - Dial-up info: https://www.w3.org/2017/08/telecon-info_silver-fri
>       - (Same as Silver TF, note that this page has the Silver TF time on
>       it, not the subgroup's)
>    - IRC: https://irc.w3.org/?channels=#wcag3-motion
>    - Subgroup page: https://github.com/w3c/silver/wiki/Harm-from-motion
>    -guideline-subgroup
>
> Looking forward to meeting with you on Monday!
>
> Warmly,
>
> Rain
> [image: Google logo written with braille dots and ASL hands]
> Rain Breaw Michaels
> Design Lead, Accessibility UX
> rainb@google.com
>
>