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How can we improve the instructional effectiveness of a slideshow lesson? In the present study, college students received a 12-slide multimedia slideshow lesson on how a geographic information system works. In a 2x2 design, the lesson was presented one complete slide at a time (non-segmented) or added one section of the slide at a time (segmented) when the student pressed the CONTINUE key, and the words were presented in printed form (text) or spoken form (voice). Students performed significantly better on a transfer posttest when the lesson was segmented (d = 0.34); there was no effect or interaction involving modality. The segmented version was rated as less difficult than the non-segmented version (d = 0.43). The segmenting principle was supported.
Richard E. Mayer, University of California - Santa Barbara
Ashleigh Wells, University of California - Santa Barbara
Jocelyn Parong, University of California - Santa Barbara
Jeff Howarth, Middlebury College