"Just because people say they're looking for a particular set of characteristics in a mate, someone like themselves, doesn't mean that is what they'll end up choosing," Peter M. Todd, of the cognitive science program at Indiana University, Bloomington, said in a telephone interview.

In the study, participants were asked before the session to fill out a questionnaire about what they were looking for in a mate, listing such categories as wealth and status, family commitment, physical appearance, healthiness and attractiveness. After the session, the researchers compared what the participants said they were looking for with the people they actually chose to ask for another date.

Men's choices did not reflect their stated preferences, the researchers concluded. Instead, men appeared to base their decisions mostly on the women's physical attractiveness.

Women's actual choices, like men's, did not reflect their stated preferences, but they made more discriminating choices, the researchers found.... [W]omen were aware of the importance of their own attractiveness to men, and adjusted their expectations to select the more desirable guys.

"Women made offers to men who had overall qualities that were on a par with the women's self-rated attractiveness. They didn't greatly overshoot their attractiveness," Todd said, "because part of the goal for women is to choose men who would stay with them."

But, he added, "they didn't go lower. They knew what they could get and aimed for that level."