Racial bias, even when we have good intentions

These kinds of methods have been used in a variety of research, especially in the last 20 years. Here are just some of the general findings:

■ When doctors were shown patient histories and asked to make judgments about heart disease, they were much less likely to recommend cardiac catheterization (a helpful procedure) to black patients — even when their medical files were statistically identical to those of white patients.

■ When whites and blacks were sent to bargain for a used car, blacks were offered initial prices roughly $700 higher, and they received far smaller concessions.

■ Several studies found that sending emails with stereotypically black names in response to apartment-rental ads on Craigslist elicited fewer responses than sending ones with white names. A regularly repeated study by the federal Department of Housing and Urban Development sent African-Americans and whites to look at apartments and found that African-Americans were shown fewer apartments to rent and houses for sale.

■ White state legislators were found to be less likely to respond to constituents with African-American names. This was true of legislators in both political parties.