This report discusses research commissioned by the Corporation for Public Broadcasting in order to evaluate prototypes of digital public television programming. There were two phases of research, the first using exclusively linear demonstrations of interactive public television, and the second demonstrating computer simulations of three digital programs. The primary goal of the research was to formulate models for successful interactive public television using available linear and computer-based prototypes. Since these prototypes are designed to demonstrate potential interactive techniques and not to be aired as they are, this report concentrates more on the general findings from reactions to the clips rather than diagnosing weaknesses. Following an outline of key findings, detailed findings are discussed in terms of expectations for the future of television, attitudes toward public television as an interactive leader, general reactions to interactivity, and interface issues. Suggestions for developing models for interactive programming are offered. (AEF)