One human subject was removed from the experiment for having prior familiarity with the Monty Hall problem.
This is a commendable effort to make this a controlled experiment. OTOH, I have to wonder if the sort of person who would be likely to learn about/​understand the monty hall problem would also, before learning about the problem, be better at solving it than a pigeon. That is, does actually knowing too much about the problem to be in the study correlate with other mental attributes that would enable a human to beat a pigeon (statistical interest and understanding, rationality, etc)?
This is a commendable effort to make this a controlled experiment. OTOH, I have to wonder if the sort of person who would be likely to learn about/​understand the monty hall problem would also, before learning about the problem, be better at solving it than a pigeon. That is, does actually knowing too much about the problem to be in the study correlate with other mental attributes that would enable a human to beat a pigeon (statistical interest and understanding, rationality, etc)?