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Koran, Mary Lou; Koran, John J., Jr. – Journal of Research in Science Teaching, 1980
Investigates whether placement of pictorial adjuncts before or after related textual material enhances instructional effectiveness for learners of varying ability. Junior high students (N=84) were randomly assigned to one or three treatments in which a diagram of the hydrologic cycle was inserted before, after, or omitted from the text. (CS)
Descriptors: Academic Aptitude, Aptitude Treatment Interaction, General Science, Junior High Schools