On Skype with Eliezer, I said: "Eliezer, you've been unusually pleasant these past three weeks. I'm really happy to see that, and moreover, it increases my probability than an Eliezer-led FAI research team will work. What caused this change, do you think?"

Eliezer replied: "Well, three weeks ago I was working with Anna and Alicorn, and every time I said something nice they fed me an M&M."

If I recall my high school psychology class correctly, you can get a stronger and more persistent effect by secretly rolling a dice and note the number, and when Eliezer says that many nice things, give him an M&M, roll the dice again for a new target number of nice things.