Procedure- to test the matching hypothesis, they advertised a 'computer dance' for new students at a US university. From a large number who bought tickets, 177 males and 170 females were randomly selected. When they came to collect their tickets, 4 student confederates rated their physical attractiveness. P's were asked to complete a questionnaire to assess their 'ideal partner' for the dance. During the dance, p's were asked to complete a questionnaire about their dates, and a follow-up was sent 6 months after.