Experimental Analysis of Interaction in Encoding Information in the Visuals, Verbals and Letters of an Educational Movie.

在观看教育电影时，学习者同时接收视觉和听觉信息。电视和电影这种复杂的媒体可以用符号或语言编码来呈现图片、音频和印刷品。然而，传统的媒体研究将媒体视为一个整体系统，这种研究没有承认的是，媒体刺激有独立的属性，这些成分的相互作用是各种媒体的特征。本研究关注的是这些组件的交互过程，特别是音频和视觉组件之间的竞争。结果表明，音频比印刷有优势，观看电影时的眼球运动反映了学习者的理解能力。在画法几何教学中，尝试了用计算机图形功能代替黑板和OHP纸来呈现图形的CAI实体化。所开发材料的内容有：(1)直线与各种实体交点的投影、同多面体的交点和同曲面体的交点。(2)各种实体的发展和测地线的绘制。

In watching an educational movie, a learner receives visual and auditory information simultaneously. The complex media of television and film can present pictures, audio, and print in iconic or linguistic codes. However, traditional media research has treat media as a total system, what such research fails to acknowledge is that there are separate attributes of media stimuli, and interaction of these components characterizes various media. This study is concerned with the interactive processes of these components , especially with competition between audio and visual components. As its results, it is suggested that audio has advantages for print, and that eye movement during watching an movie reflects learner's understanding.For the purpose of presenting the figures drawn up by using of the graphical functions of micro-computer instead of those by blackboard writing and by OHP sheet, CAI materialization is tried in the instruction of descriptive geometry. The contents of developed materials are as follows: (1) Projections of intersecting points of the line and the various solid, intersections of fellow polyhedra and intersections of fellow bodies having curved surfaces. (2) The developments of various solids and drawing of geodesic line.