> Go ahead and select one of the cups. Let’s say you pick the cup on the right. I slide it toward you but don’t let you look underneath. > I then ask you if yo

> Go ahead and select one of the cups. Let’s say you pick the cup on the right. I slide it toward you but don’t let you look underneath. > I then ask you if you want to switch to the cup on the left, to change your choice. > Would you switch? Again, like in some Monty cases, the formulation of the problem is annoyingly ambiguous. I would answer "It depends. Do you always offer the switch, no matter the location of the dice, and no matter my initial choice?". Only if they say yes, would I conclude that switching shouldn't affect the odds. > But now, if you switch and are correct, you win $6. If you stick with your original choice and are right, you still only get $5. Would you switch now? This only makes people more suspicious that the offer did in fact depend on the initial choice. If they want to study regret, they should go out of their way to make sure the test subject understands that there is no such dependency.