This report, one of two investigations into the use of public television and radio requested by the Corporation for Public Broadcasting and prepared by their Office of Communication Research, compares the demographic characteristics of the public-television viewer and the public-radio listener. Data gathered in the 1976 Roper Reports, which provided a total of 4,004 completed interviews, were used as a source of information. Data about television viewers were based on the responses of 1,927 individuals who claimed to view one or more public television programs during the previous four weeks, while information concerning radio listeners was gathered from 199 respondents who claimed to listen to one or more public radio stations during an average seven-day period. Generally, statistical comparisons indicated that a larger percentage of the television audience is female, that the radio audience has a higher percentage of listeners who have college education or more and who hold executive and professional positions, that television audiences have a higher percentage of viewers with children under age 13 and with family incomes ranging between $12,000 and $18,000, and that radio audiences have a higher percentage of male listeners. (KS)