Voting and cognitive disabilities
The article refers to recommendations for national standards related to allowing people with cognitive disabilities to be made by the American Bar Association's Commission on Law and Aging. These proposed standards were developed at a symposium I was at in March. The consensus of the symposium was that people be prevented from voting only if they cannot indicate, with or without help, “a specific desire to participate in the voting process.”
State officials are concerned with enforcement of old laws that bar people with mental disabilities from voting as "idiots" or "insane." Others are concerned that voters with cognitive disabilities are being coerced or worse, that someone else is voting for them in a way they would not have intended.
What does this have to do with ballot design?
The ABA recommendation makes the ballot (and the voting system overall) the test of whether someone can vote. That is, if a registered voter expresses the desire to vote and is able to mark and cast a ballot (with or without help), she can vote. If she spoils the ballot in the attempt to vote, there's no harm done to her or to the electoral system.
Using plain language in clear instructions along with best practices in visual and graphic design all voters benefit. People with cognitive disabilities (and let us not forget that some large number of Baby Boomers are going to end up with some level of dementia) will be able to cast a secure, private ballot that they feel confident about.