I had earlier linked to an online test for implicit assumptons and biases. There's an extremely interesting article in Sunday's Washington Post about how the test came to be devised: See no Bias: "Many Americans believe they are not prejudiced. Now a new test provides powerful evidence that a majority of us really are. Assuming we accept the results, what can we do about it?"
It should be obvious that many or most or all of one's assumptions are strongly conditioned by one's culture; but the article contained a wonderful image of that idea: "The Implicit Association Test measures the thumbprint of the culture on our minds," says Banaji, one of three researchers who developed the test..."