Funny Numbers- Do Polls Lie About Race?
by KATE ZERNIKE (excerpt)

NEW YORK TIMES

THREE weeks to Election Day and polls project a victory, possibly a big one, for Barack Obama.

Yet everywhere, anxious Democrats wring their hands. They’ve seen this Lucy-and-the-football routine before, and they’re just waiting for their ball to be snatched away, the foiled Charlie Browns again. Remember how the exit polls in 2004 predicted President Kerry?

The anxiety is more acute this year, because Senator Obama is the first African-American major-party presidential nominee. And even pollsters say they can’t be sure how accurately polls capture people’s feelings about race, or how forthcoming Americans are in talking about a black candidate.

In recent days, nervous Obama supporters have traded worry about a survey — widely disputed by pollsters yet voraciously consumed by the politically obsessed — that concluded racial bias would cost Mr. Obama six percentage points in the final outcome. He is, of course, about six points ahead in current polls. See? He’s going to lose.

If he does, it wouldn’t be the first time that polls have overstated support for an African-American candidate. Since 1982, people have talked about the Bradley effect, where even last-minute polls predict a wide margin of victory, yet the black candidate goes on to lose, or win in a squeaker. (In the case that lent the phenomenon its name, Tom Bradley, the mayor of Los Angeles, lost his race for governor, the assumption being that voters lied to pollsters about their support for an African-American.)