Myth: Americans think they know a lot about other countries but really are clueless.

Verdict: Self-cancelling prophesy.

Method: Semi-humorous generalization from a single data series, hopefully inspiring replication instead of harsh judgment :)

I decided to do some analysis about what makes people overconfident about certain subjects, and decided to start with an old stereotype. I compared how people did on the population calibration question (#9) based on their country.

Full disclosure: I'm Israeli (currently living in the US) and would've guessed Japan with 50% confidence, but I joined LW (unlurked) two days after the end of the survey.

I normalized every probability by rounding extreme confidence values to 1% and 99% and scored each answer that seemed close enough to a misspelling of Indonesia according to the log rule.

Results: Americans didn't have a strong showing with an average score of -0.0071, but the rest of the world really sucked with an average of -0.0296. The reason? While the correct answer rate was almost identical (28.3% v 28.8%) Americans were much less confident in their answers: 42.4% confidence v 46.3% (p<0.01).

Dear Americans, you don't know (significantly) less about the world than everyone else, but at least you internalized the fact that you don't know much*!

Next up: how people who grew up in a religious household do on the Biblical calibration question.

*Unlike cocky Israelis like me.