<p>"The arrest of Harvard professor Henry Louis Gates Jr. sparked allegations of racism, followed by fierce denials that race played a role in the 911 call or the police response to the report of a possible break-in at his Cambridge home. But social psychology research indicates that regardless of people’s stated attitudes about race, unconscious racial biases can influence their behavior in surprisingly powerful ways.</p>
<p>That means that people who are not racist may unknowingly behave in ways that reflect racial stereotypes, even when they may disagree with such ideas. One study found that doctors with more unconscious bias against blacks were less likely to give African-American heart attack patients clot-busting medication than white patients. Another found that when participants in a computer simulation were told to shoot criminals but not unarmed citizens or police who appeared on the screen, more black than white men were incorrectly shot…</p>
<p>It’s impossible to know whether hidden bias caused Cambridge police Sergeant James M. Crowley, a white man who teaches courses on how to avoid racial profiling, to arrest the African-American Gates. But research indicates that a large majority of white people, and about half of black people, are quicker to make positive associations with white people and negative associations with black people.</p>
<p>“I think our data, obtained from millions and millions of people, show a real disparity between who we think we are, who we say we are . . . and what actually goes on in our heads,’’ said Mahzarin R. Banaji, a Harvard psychology professor who is a leader in studying such implicit bias.</p>
<p>Banaji’s research has found, for example, that many white people more quickly associate positive adjectives with white faces and negative adjectives with black faces. In computerized tests, many white people also more quickly associate harmful weapons with black faces than with white ones.</p>
<p>Overall, Banaji said, about 75 percent of white people show a white preference in such lab experiments, whereas black people are split half and half between favoring black and white.</p>
<p>That means that while the incident in Cambridge two weeks ago has layers of complexity and confusion, a vast body of scientific literature suggests the important role that unconscious bias would probably play."
[In</a> matters of race, research shows key role for unconscious bias - The Boston Globe](<a href=“http://www.boston.com/news/local/massachusetts/articles/2009/07/30/in_matters_of_race_research_shows_key_role_for_unconscious_bias/]In”>http://www.boston.com/news/local/massachusetts/articles/2009/07/30/in_matters_of_race_research_shows_key_role_for_unconscious_bias/)</p>