One hundred thirteen residents of Carbondale, Illinois, participated in a study of the diffusion of information about the announcement of Walter Mondale's nomination as the Democratic vice-presidential candidate in the 1976 election. Data were collected the day of the announcement, for a period of ten hours. Results indicated that 76% of those asked were aware of the identity of the nominee. Interpersonal sources were most important in the diffusion of the information. The event was judged by the respondents to be more important than it was interesting. A multiple regression analysis showed that 93% of the variance in knowledge could be explained by seven independent variables: source of knowing, place of knowing, time of knowing, importance, interest, sex of the respondent, and age of the respondent. (Author/AA)