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01 level Abstract achievement test Analysis of covariance Analysis of variance audio Audio-Visual Communication Review average Biology cent chemistry classes classroom closed-circuit television comparative effectiveness comparisons control group determine the relative educational television Eidophor elementary evaluation experiment experimental group face-to face-to-face group face-to-face instruction face-to-face presentation face-to-face teaching favorable fifth-grade four grade high school indicated no significant instructional television instructor ITV lessons ITV presentation ITV students Key variables kinescope lecture mathematics methods of instruction motion pictures motivated film open-circuit Pennsylvania State University pictorial Port Washington posttest pretest Problem psychology questionnaire randomly assigned reading received relative effectiveness Sample screen sections semantic differential semester significant differences significantly higher scores skills sound films students took Subject taught teachers technique televised instruction television and face-to-face test scores tion to-face treatment TV and face-to-face TV group TV teaching TV-taught U. S. Naval University Unpublished Doctor's dissertation USOE Project Number week