Utilized two psychologists as actors in making four videotapes to depict background information and verbal modes of communication for alcoholics according to black-white race differences and high-low socioeconomic status. Forty graduate psychology students (10 per group) then were shown randomly one of the four recordings and asked to make a diagnosis. A significant difference was found for the effects of race, socioeconomic status, and race X socioeconomic status interaction on the correct diagnosis of alcoholism. Results were interpreted as suggesting that a clinician's personal biases and/or prejudices might extend into the clinical diagnosis and treatment of clients.