I have now completed the test I started yesterday on Yahoo Answers (see link above), and I am in a position to present some results.
Because the test was not done in English, I shall translate it:
"Telepathy test: which word did I write of my paper?
Hello, I invite you to participate in a simple extra-sensory perception test.
I recently wrote and surrounded one of the five words: "voice", "head", "persecution", "violence" and "secret" on a sheet of paper close to my computer. I shall repeat this word from time to time during this test.
I ask you to write it here (if you think you know it, even if you are not quite sure)
Thank you in advance for participating."
Five answers were given. "Persecution" (which was the correct answer) was answered twice, by Alexandre and an anonymous member; "voice", "head" and "secret" were responded one time each, respectively by Yellowstone, muret16 and cheikh tidiane, and nobody gave "violence" as the correct answer.
I also note that Alexandre, who correctly replied "persecution", wrote a fairly good, respectful and serious-sounding little text:
(while the other responders did not), and that he has the best "best answer rate" on Yahoo of all participants (14% ; the others have 8%, 6% and 2 %, I don't know the best answer rate of the anonymous participant). This enhances his credibility.
So I believe that this test has been reasonably successful.