A former forensic artist for the San Jose police department met a series of women and asked each to describe the way they look. He had no way of seeing them behind a curtain. He prompted them to detail everything: hair length, facial structure, their most prominent features. He then sketched each participant from their self-description.
Each woman was asked before the study to get to know one of the other participants. The forensic artist then prompted each woman to describe the other's face.