Yo Biased!

Interesting research! I'm O.K., You're Biased:

"Researchers asked subjects to evaluate a student's intelligence by examining information about him one piece at a time. The information was quite damning, and subjects were told they could stop examining it as soon as they'd reached a firm conclusion. Results showed that when subjects liked the student they were evaluating, they turned over one card after another, searching for the one piece of information that might allow them to say something nice about him. But when they disliked the student, they turned over a few cards, shrugged and called it a day. "

I wish they told us more about other control variables e.g., The gender of students and the gender of subjects (interviewers). How the students were dressed, subject and students color, race, education level, ethnicity, etc.