Criticizes past research on redundancy in television learning for its inconsistent definitions and ambiguous examples. Four areas of concern are considered: the meaning and use of the term; the nature of signs (iconic or digital) used in audio and visual communication; the subjectivity of interpretation; and differences in meaning between separate…

Reviews multichannel learning research to find the best ways to combine audio and video in television to improve learning, and summarizes the research findings into principles for instructional television production. Highlights include the effects of redundancy on learning and on audience attention, message clarity, and problems in instructional…