Presents a definition of educational technology that points to three areas where research is needed: instructional theory, design-oriented research, and instructional design procedures. Computer assisted instruction and perceptions of media and technologies are discussed, and 74 references are given. (Author/LRW)

Presents and develops a general model of the nature of a learning system and a classification for learning systems. Highlights include the relationship between artificial intelligence and cognitive psychology; computer-based instructional systems; intelligent instructional systems; and the role of the learner's knowledge base in an intelligent…