Stupid normal people

A common bias among the smart is to overestimate how smart everyone else is. This was certainly my experience in moving from top rank universities as a student to a mid rank university as a teacher. A better intuition for common abilities can be found by browsing the US National Assesment of Adult Literacy sample questions.

For example, in 1992 out of a random sample of US adults, 7% could not do item SCOR300, which is to find the expiration date on a driver’s license. 26% could not do item AB60303, which is to check the “Please Call” box on a phone message slip when they’ve been told:

Overcoming Bias: Stupider than You Realize