I’m aware of Wordle, of course. I can’t login to Twitter without being deluged with the Wordles of the people that I follow. Occasionally, I’ll retweet funny jokes about Wordle. But my interest in actually doing Wordle, or any other puzzle, is zero.
I’ll join Randall Munroe of xkcd in giving this answer from now on. Although, in a proper study, all participants should be blind to their group placement, it is inevitable that some people will figure out that they’re getting a placebo or are not receiving the same treatment as others.