It may claim to be a nationally representative sample, but how do we know this? Are they going to the group homes for the retarded and making sure the families bring out the disturbed guy in a back room?
I’m reminded of how many people have very few friends who are stupid. Social desirability bias—or selection bias?
It may claim to be a nationally representative sample, but how do we know this? Are they going to the group homes for the retarded and making sure the families bring out the disturbed guy in a back room?
I’m reminded of how many people have very few friends who are stupid. Social desirability bias—or selection bias?
EDIT: See Hana’s comment there.
Or both: isn’t intelligence correlated with size of social circle?
If so it really could be that the average friend is smarter than the average person.