An interesting thing about the Wason selection task is that people do a lot better when given a task that requires the exact same reasoning but involves social situations.
For example if the cards have on one side either a picture of a mug of beer or a picture of a can of soda, and the other side have a number representing the age of a person drinking that drink, and the rule they are supposed to be checking is that if someone is drinking beer they have to be at least 21 then 75% of people correctly figure out that they need to check the other side of the cards showing beer and the cards showing an age under 21.
Here's Wikipedia's article on the Wason selection task [1].
For example if the cards have on one side either a picture of a mug of beer or a picture of a can of soda, and the other side have a number representing the age of a person drinking that drink, and the rule they are supposed to be checking is that if someone is drinking beer they have to be at least 21 then 75% of people correctly figure out that they need to check the other side of the cards showing beer and the cards showing an age under 21.
Here's Wikipedia's article on the Wason selection task [1].
[1] https://en.wikipedia.org/wiki/Wason_selection_task