What technique did Byrne use in 1971 to explore social attraction based on similarity?

Byrne's use of the bogus stranger technique in 1971 was a significant contribution to the understanding of social attraction based on similarity. This method involved presenting participants with a profile of a stranger and comparing their responses to the profiles generated based on manipulated similarities or differences. Participants believed they were evaluating an actual individual, thus allowing researchers to assess how perceived similarities influenced attraction to this "stranger."

The essence of this technique is that it effectively isolates the impact of similarity on attraction without the complications of previous relationships or direct interactions. By focusing on controlled settings where participants could only respond to the information presented, Byrne could robustly demonstrate that individuals are more attracted to those with whom they share attributes or beliefs—highlighting the importance of perceived similarity in fostering social connections.