I'm trying to remember a word that I read many years ago. It describes a rhetorical device in which an individual is used to represent a group. For example:

"It can help to understand the disabled user’s deeper values and needs." -- Represents all disabled users.

I've tried googling all types of combinations, but it's difficult to come up with the precise keywords that get me there. If anybody knows this word and is willing to share, it would be much appreciated.

Symbol
A person, place, action, or thing that (by association, resemblance, or convention) represents something other than itself.

Sounds like a variety of synecdoche.

Yes, I think that must be it, although, so many specific words in English, I wonder if there's not one that's even more precise.

Thanks, Faldage!