The Relationship Between Understandability and Presentation Timing Among Illustrations, Closed Captioning, and Narration In Multimedia Manuals

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  • SHIMADA Hideaki
    Faculty of Education, Shinshu University
  • KITAJIMA Muneo
    Center for Service Research, National Institute of Advanced Industrial Science and Technology

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  • マルチメディアマニュアルにおける画像,字幕,ナレーションの提示タイミングと分かりやすさの関係
  • マルチメディアマニュアル ニ オケル ガゾウ ジマク ナレーション ノ テイジ タイミング ト ワカリ ヤスサ ノ カンケイ

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Abstract

In order to improve understandability of multimedia manuals, the relationship between understandability and presentation timing among illustrations, closed captioning, and narration was discussed from the perspective of cognitive psychology. Psychological experiments identified understandable presentation timing among them. Three experiments are carried out, using a multimedia manual which explains emergency evacuation in case of earthquake. Participants were required to subjectively evaluate understandability of individual segments included in the manual. The presentation timing of three kinds of elements in the manual had been manipulated in 1-second interval (experiments 1 and 2) and 0.5-second interval (experiment 3). The results showed that understandable segments satisfy the following two conditions: starting a narration a second after illustrative presentation and adding closed captions between illustrative presentation and the narration.

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