多媒体教学中通道效应的局限性及启示

Research Status and Limitations of Channel Effect in Multimedia Teaching

为利用通道效应优化多媒体教学效果,基于通道效应的各种理论解释及局限性分析产生通道效应的外部条件,发现从加工系统本身看,注意资源的分割,认知负荷的过载,及加工通道的临近性是产生通道效应的重要因素。同时也不可忽略学习材料的呈现时间、文本与图片的关联等外部条件。教学者应综合考虑自身的认知加工能力、调整学习材料的呈现速度等因素,利用通道效应优化多媒体教学效果。

In order to optimize multimedia teaching effect by channel effect,the study analyzes the internal and external conditions of channel effect based on the theoretical explanations and limitations of channel effect.From the perspective of processing system,it is found that the partition of attention resources,the overload of cognitive load and the proximity of processing channel are the important factors to produce the channel effect.At the same time,external conditions,such as the presentation time of learning materials,and the association between text and pictures,cannot be ignored.Teachers should consider their own cognitive processing ability and adjust the presentation speed of learning materials,etc.to optimize the multimedia teaching effect by channel effect.