Political moderates and independents are not as smart on average

Long time readers know that it’s trivially easy to extract information from the GSS that political moderates and independents are not as intelligent as partisans and ideologues. New readers are not always familiar. A comment:

#8 Do you have something to back up the idea that independents are less intelligent? If anything, I would’ve expected the opposite- that independents are capable of thinking for themselves instead of following the party line.

First, a quick review of the data. I used two GSS variables, PARTYID and POLVIEWS, and limited the sample to non-Hispanic whites after the year 2000. I removed those of “Other party” as well. Finally, I crossed that against vocab score results, which correlates with intelligence with a value of 0.70. It is rather obvious that middle-of-the-roaders are not as bright:

WORDSUM SCORE
0-2 3 4 5 6 7 8 9 10
Strong Dem 15 8 13 9 10 12 14 15 20
Dem 17 24 14 15 15 13 14 15 15
Lean Dem 11 9 8 11 11 11 10 18 14
Independent 26 23 23 21 18 16 14 11 11
Lean Repub 10 8 12 10 8 12 13 10 12
Repub 15 21 18 21 21 20 18 16 13
Strong Repub 6 8 11 13 18 16 16 16 15
Extreme Liberal 5 3 2 2 1 4 3 4 7
Liberal 5 11 6 6 8 12 10 16 20
Lean Liberal 6 10 13 7 10 11 12 17 14
Moderate 44 45 44 43 39 33 30 28 24
Lean Conservative 21 12 13 18 16 18 18 14 16
Conservative 14 16 16 20 22 17 22 19 15
Extreme Conservative 5 4 5 3 4 6 3 2 3

As you can see the proportion in the middle decreases as you go up in intelligence. Why? A straightforward explanation is that independents and moderates are “low information” political actors. And therefore they are likely to be less intelligent in the first place. But there is I think another dynamic going on: the smart know where to go to reinforce their biases. That is, they’re far better at motivated reasoning, and become progressively more polarized and ideological.

My point is that the reality is on many topics very few of us ‘reason for ourselves.’ Rather, we trust certain people who know better. On economics smart liberals trust Paul Krugman, and smart conservatives trust Greg Mankiw. Not only are these individuals gifted with a specialized knowledge of economics in relation to the typical smart person, but they’re much smarter than average. That’s one reason I’m usually not interested in talking politics in detail with people: why not just go to the source that they’re garbling?

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