It is a pretty standard statistical test taught in any bachelor level class covering statistics (or earlier in Germany we did this in 11 the grade) . This setup also includes https://en.wikipedia.org/wiki/Blocking_(statistics) another pretty standard method you learn by just looking how others do experiments.
I've said this via Twitter and I'll say it now: I'd expect there to be huge learning effect sizes for anything that alters the way we parse information, even in such "minor" ways as BR.
I'd like to see what the difference would be like after a day, four, and a week of reading articles with BR, if that's viable to enlist people for at all.