This compilation of readings in educational media and research makes accessible published and unpublished documents relevant to designers and users of educational media. Volume I is divided into two parts, "Basic Foundations" and "Media Characteristics.""Basic Foundations" refers to that upon which a science of instructional media design and application may be built. Ten articles discuss the psychophysics of pictorial perception, the semantic and symbolic characteristics of the pictorial image, a model based upon the limited channel theory, an overview of perception theory, learning behavior and aesthetics in the light of relationships of instructional media to learning theory, and applications of research and technology to instructional media design and use. "Media Characteristics" contains 6 papers describing film attributes and psycholinguistics, single and multiple channel perception versus modality, and characteristics of compressed information. These papers describe the characteristics of instructional media and compare their effects. Extensive bibliographies follow these papers. (MM)