Snyder, M., Tanke, E.D., & Bersheid, E. (1977). Social perception and interpersonal behavior: On the self-fulfilling nature of social stereotypes. Journal of Personality and Social Psychology, 35, 656-666.
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Snyder, Tanke, and Berscheid (1977) is a classic article because they were among the first to investigate the behavioral consequences of our impressions of other people. They found that our initial impressions of other people can become self-fulfilling prophecies. In this study, male participants were led to believe that another female participant they would talk to on the phone was either attractive or unattractive. When male participants believed their conversation partner was attractive (instead of unattractive), these partners were more likely to behave in ways consistent with stereotypes about attractive people (friendly, likeable, sociable, etc.).