Members of one group were brought, one by one, into a waiting room with two other “students”, one black and one white, who were, in fact, in on the experiment.

The group was split evenly by gender and nearly half were white, 24 percent were black, 21 percent were Asian-American and the rest were from other groups.

In fact, I couldn't find an example of a group 4 fax compressed black-and-white image that would display using that program.