since what that test was doing was trying to illegally deprive black people of their right to vote I'd think they'd try to keep it as hidden as possible, which is what I would recommend one do when breaking the law.
You don't. You'd find contemporaneous accounts from people who'd taken the test and complained about it. That's how the social science of history works. I think the consensus here is that the brain-teaser test is either not real, or was not widely used (nobody has been able to find an instance where it was).
A clarifying bit of context: there were extensive complaints about the multiple-choice constitutional interpretation tests that were given at the time.
> How hidden can you keep a test that many thousands of voters take?
After its taken, and presuming active measures were taken to prevent distribution other than for people taking it who would then return it, pretty easily. Paper is biodegradable, burns easily, can be shredded (and recycled into new paper), etc.
how do you know how many people took the test? They don't need to use the super-secret fallback test to keep every black person from voting, the test was if all the other methods to keep them from voting didn't work, and then you didn't necessarily use all the test, you used some of the test, just enough to say they failed, and then what? Do you register the test somewhere?
Since the literacy test was used at the discretion of the authorities in charge of the vote they could choose who to give it to based on how likely they were to get away with using it.
I mean if you know the black people in your district will vote for a particular party you probably don't actually want to keep the black people in your district from voting, you want that party not to win because otherwise the party might help the black people living in your district.
If there are 1800 black people and 1100 white people that can vote in your district, then maybe you only need to keep 900 people from voting to be safe.
So then you announce you will be checking outstanding warrants at the polls, 600 people don't show up. You only need to keep 300 people from voting! So you start giving literacy tests to black voters but letting the white voters through - how many black people you think you will actually need to give that literacy test to before the rest of them wise up that you aren't going to be letting them vote?
I'd say maybe 20.
Now how many of them going to get copies of that test to do something about? What if you don't want to give them a copy of the test? How they going to get that copy of the test?
I'm sorry but I think this kind of thing would be pretty under-documented, just like most crime. I'm agreeing you can't keep it thoroughly hidden but hidden enough that it is difficult to say with any specificity this was the actual test used in that district on that day to fail these people.
on edit: removed something that was probably a bit rude, sorry, was going through some problems with kid at the moment and frustration transferred to my writing.
If there is a credible threat of retaliation (violence, employment, housing) for even trying to vote, then this is very effective. Why take a big risk if you won’t get to vote anyway? This way you don’t actually have to give the test very often, everyone quickly figures out the “rules” and falls into line.