A presentation at A11y Bytes in May 2023 in Melbourne VIC, Australia by Allison Ravenhall
1 in 11,000 people use a screen reader
1 in 28 people uses Reduce Motion
Screenshots comparing Reduce Transparency off (parent page content blurred and visible around modal content) versus Reduce Transparency on (parent page content totally obscured, improved contrast)
1 in 38 people uses Reduce Transparency
Screenshots comparing Dark mode off (light background, dark text) versus Dark mode on (dark background, light text)
1 in 2.7 people use dark mode
Four screenshots demonstrating the change in layout from X Small (text size #1, the smallest) to Large (text size #4, default), to XXX Large (text size #7, the largest in the default range) and AX5 (text size #12, the absolute largest)
Bar chart of distribution of text size settings Small (text sizes 1, 2, and 3) = 8.81% Default (text size 4) = 68.75% Large (text sizes 5, 6, and 7) = 19.34% Very large (text sizes 8 and up) = 3.11%
X Small = 3.04% Small = 2.25% Medium = 3.51% Large = 68.75% X Large = 6.47% XX Large = 4.81% XXX Large = 8.06% AX 1 = 1.77% AX 2 = 0.95% AX 3 = 0.28% AX 4 = 0.06% AX 5 = 0.05%
A British site that extrapolates how many people using your site have disabilities, based on population demographics: https://how-many.herokuapp.com
Using numbers to justify accessibility efforts won’t get you far. But it’s super-interesting to see how people are using your app.
