Defines and explicates the systems approach--the conceptual heart of educational technology--in the broader context of general systems theory, and presents four propositions based on principles from four schools of philosophical thought that may provide alternative means for analyzing the mediation of experience and practice of educational…

Educational technologists have moved from a unique concern with the how-to-do-its of behavioral change to the inclusion of what to teach, based on measurable objectives. The formal consideration of why can be seen as possibly having several layers, including considerations of results, both within and external to, an organizational context. (VT)

The technology of instructional development is advancing slowly but steadily; it is, however, underutilized in the educational system. The creation of a "market" for research and development in education is a necessary condition for the achievement of real progress, along with progress in such other fields as videodisc and quality control.…

This theoretical model for message design directs the designer to design a block of time that optimizes the information load and message complexity within the constraints of the receiver's abilities and experience, the requirements of the source, and the capabilities and limitations of the medium. (Author/JEG)

Advances a theoretical perspective for analyzing education and instructional technology as disciplines using the science of semiotics as a framework for identifying the components, relationships among components, and meanings of components in educational systems. A 30-item reference list accompanies the text. (Author/JL)