Barack Obama makes official move towards presidential campaign

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Again, this may have skew. Working class will likely perform worse on those tests than college educated.</p>

<p>I'd be more interested in seeing the data normalized with equal numbers of people in specific educational groups. Make it a good sample and then we'll see. Otherwise, you can't control for the inevitable difference in educational levels' performance on verbal IQ tests.

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College education is roughly split between democrat/republican (at the undergraduate level)...</p>

<p>Advanced degrees heavily bias toward democrats though. If anything, this bias is in favor of the democrats.</p>

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There's more to building a good sample than just numbers. I can sample 1000s of people and still have a bad representation of the population...

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Sorry for that implication. I'm assuming that the GSS people do know what they are doing.</p>