抄録
In this survey we provide an overview of the instructional use of radio, television, and computer-assisted instruction in the United States. We refer to a number of more extensive publications. It is to be emphasized that the literature on the subject matter of this survey is now enormous, even when the survey is restricted to the United States. A survey that covers the three media that are the concern of this survey, with particular emphasis on the evaluation of their effectiveness, is to be found in Jamison, Suppes, and Wells (1974). Other references are given in the text.
