A self-instructional film should be learner-oriented rather than content-oriented. Its objectives should be stated in terms of observable, specific behavior. The distinguishing characteristic of such terms is that they are subject to few interpretations. Objectives should be to identify, name, order, describe, and construct. The foregoing may be…

Man seems unable to retain different information from different senses or channels simultaneously; one channel gains full attention. However, it is hypothesized that if the message elements arriving simultaneously from audio and visual channels are redundant, man will retain the information. An attempt was made to measure redundancy in the audio…