This is not a joke, follow the science.
Gullibilitrons are units of measurement to accurately gauge a person's gullibility. It was inspired by an episode I had in my teens when walking by a Scientology center.
They offered to read my Thetans by having me hold two metal handles. I asked if they
were reading the resistance in ohms across the circuit of my upper body like a lie detector or if they were measuring my epidermal capacitance. The looked at each other and said “Okay, thank you.” and politely ushered me out.
Thing is, I wasn't trying to be a smartass, it was a sincere question.
Anywho, I think the same concept could be applied in a new fashion, just be honest about what you're measuring.
Have them hold the handles and mildly shock them as they answer various questions. "Did you ever walk a dog around like a wheelbarrow holding it by its hind legs?" "No.... OUCH!"
Okay this idea is stupid. Time to get some work done. Thanks for your patience.