And no, preferring to date someone of a particular race isn't in itself racist.
"Beauty is a cultural idea as much as a physical one, and the standard is of course set by the dominant culture," Rudder writes.
Co-author Dinah Morley was said there was a lack of understanding over what it meant to be mixed race.
Asian men, black men and black women got the worst ratings, while Asian women and Latina women fared the best.
Here's the chart of users' preferences from 2009: And here's the chart from 2014: As you can see, the biases stayed pretty consistent between 20. The results here are pretty much the same as data taken from other dating sites.
The research, backed by the National Children’s Bureau, also found that other races of people, and those such as teachers, could not understand their background.
The report called ‘‘ collected information from many different studies, along with interviews from mixed-race people talking about their experiences as children.
A British report has found that mixed-race people have the greatest risk of suffering from mental health problems, in many cases because they are unhappy being mixed, and instead preferring to associate with one of their parent’s races.