To determine preschool children's responses to various television program formats, and to discover which would be most effective in holding attention, observers recorded children's reactions to 115 lesson segments viewed in their homes. All behavior responses to elicited and unelicited stimuli were recorded, using a printed form and coding system. Responses to a montage of taped commercial and public-television programs, shown in a laboratory environment, also were recorded. Ten major techniques of presentation were identified and responses to each scored. The amount of viewer attention also was rated. It was found that variety of format and short program segments were most effective in promoting response and holding attention. Coding forms and a ranking of segments by viewer interest are appended. (SK)