Alternatively: rig a random number generator such that it can be fixed to a known number without the subject’s knowledge. Demonstrate the random number generator in its unfixed state.
Then fix the generator for one trial, leave the room, and have the subject report that number plus their number of sexual partners.
Alternatively: rig a random number generator such that it can be fixed to a known number without the subject’s knowledge. Demonstrate the random number generator in its unfixed state.
Then fix the generator for one trial, leave the room, and have the subject report that number plus their number of sexual partners.