


Now, though, in the midst of the nation's first presidential campaign between a black candidate and a white one, a convergence of new political and scientific research suggests that prejudice and stereotyping among elderly white Americans in particular may not be so innocuous after all.



In other words, Grandma's biased outbursts may not be her fault. And Obama's election strategists may want to schedule more campaign stops at nursing homes.

"We learn stereotyping at a young age when we can't really appreciate it's not the right thing to do," said William von Hippel, a psychologist who studies age-related declines in the area of the brain devoted to inhibiting unwanted or socially inappropriate thoughts. "Once we get older, we can decide that racial stereotypes are wrong and we can inhibit them with an effortful act. But older adults gradually lose that ability to inhibit."

Von Hippel, a professor at the University of Queensland in Australia, has found that as the brain's frontal lobe begins to atrophy with age, elderly adults exhibit greater social inappropriateness and increased stereotyping and prejudice. And it happens despite their best intentions.

"At some level, I would say we should not hold older adults responsible for their racist attitudes," von Hippel said. "We call it 'prejudice against your will,' because we think it's not something they can control."


Referring to his elderly white grandmother, Obama said she is "a woman who loves me as much as she loves anything in this world, but a woman who once confessed her fear of black men who passed by her on the street, and who on more than one occasion has uttered racial or ethnic stereotypes that made me cringe."


For example, 35 percent of Americans age 60 and older believe it's unacceptable for whites to date blacks, according to surveys conducted by the Pew Research Center for the People & the Press. Yet just 16 percent of Baby Boomers disapprove of interracial dating—and among Americans age 30 and younger, the disapproval figure is only 6 percent.


More than 4.5 million people worldwide—730,000 of them Americans—have participated in the online Project Implicit study, which captures subconscious, or implicit, bias by asking respondents to associate positive or negative words with a series of photographs of black and white faces.

The Project Implicit data also show that whites age 60 and older exhibit 5 percent to 10 percent more bias than younger study participants.

"We don't call it prejudice; we talk about it as hidden bias or unconscious bias—a form of bias that most people are unaware they even possess, because our culture has implanted associations in their heads," said Anthony Greenwald, a psychology professor at the University of Washington and one of the founders of Project Implicit. "This is why many people who take this test are repelled by their own results."


In electoral contests involving black candidates, political scientists long ago discovered a disconnect in which some white voters, not wanting to appear racist, tell pollsters they support the black candidate but then vote for the white candidate once they get inside the voting booth.

The phenomenon has a name—the "Bradley effect"—from the 1982 California governor's race in which Tom Bradley, a black Democratic mayor of Los Angeles, consistently led the pre-election polls over his white Republican opponent but lost when the votes were counted.

Greenwald found the "Bradley effect" at work in this year's Democratic primaries in four states with relatively low black populations where Obama finished far worse than the polls had predicted.

And a new Associated Press-Yahoo News poll found that racial prejudice could cost Obama up to 6 percentage points in November. The poll also indicated that whites and blacks see racial discrimination in starkly different terms: Just 10 percent of whites--but 57 percent of blacks--said they thought "a lot" of discrimination against African Americans exists.

At the Bayou Manor assisted-living center in Houston, some residents said they expect older voters to exhibit a "Bradley effect" of their own.

"I think what people say is their intent is not necessarily how they will vote," said Margaret Wilborn, 83, an Obama supporter. "I hope it doesn't happen, but I think race will be the deciding factor in this election for a lot of older people."


"I have two black caregivers," said Iris Williams, 89, who supports McCain. "One of them is pretty smart, the other one not really. But neither of them is for Obama. So that tells you something right there."