北京生物医学工程

动画演示教学模式下大学生课堂短时注意力脑电信号研究

Study on short-term attention EEG of college students; classroom based on the animation demonstration teaching mode

作者：黄婧婕程丽莹石佳佳杜若瑜

单位：南京邮电大学地理与生物信息学院（南京 210023）江苏省智慧健康大数据分析与位置服务工程实验室（南京 210023）

关键词：脑电信号；动画演示教学模式；短时注意力；时频分析；特征值

分类号：R318.04

出版年·卷·期（页码）：2021·40·2（139-144）

摘要：

目的通过不同教学模式视频刺激实验分析人脑专注度特征，探讨动画演示教学模式对于大学生课堂短时注意力的影响。方法从30位被试者中筛选出20份观看动画演示法、传统讲授法教学视频的脑电信号，经过预处理后，采用事件相关频谱扰动（event-related spectral dynamics，ERSP）进行时频分析，同时结合主观调查问卷，分析动画演示教学模式对大学生课堂短时注意力的影响。结果时频分析结果显示，在动画演示教学模式下，时间窗30~150 s内被试者脑电信号能量更高，在beta波段（20~35 Hz）时与传统讲授教学模式之间差异具有高度统计学意义，F3、AF4、FC6通道处尤为明显。结论动画演示教学模式能够提升大学生课堂短时注意力，同时beta波段的部分特殊频段存在可识别注意力集中程度的特征值，这能够为高校课程改革采取动画演示教学方法与可穿戴脑机接口设备智能化课堂教学的应用研究提供理论基础。

Objective The paper aims at discussing the influence of animation demonstration [] teaching mode on short term attention of college students in class by using video stimulation experiments of different teaching modes to analyze the characteristics of human brain concentration. Methods We filtered 20 EEG signals during watching animation demonstration and traditional teaching videos were selected from 30 subjects. After pre-processing, event-related spectral dynamics (ERSP) were used for time-frequency analysis, and the influence of animation demonstration teaching mode on short-term attention of college students in class was analyzed in combination with subjective questionnaire. Results Time-frequency analysis results showed that, under the animation demonstration teaching mode, the eeg signal energy of the subjects was higher within 30-150 s in the time window, and the difference between the Beta band (20-35 Hz) and the traditional teaching mode was highly statistically significant, especially at the channel F3, AF4 and FC6. Conclusions The animation demonstration teaching mode can improve the short-term attention of college students in class. Meanwhile, some special frequency bands in the Beta band have the characteristic values that can identify the degree of attention concentration, which can provide a theoretical basis for the application research of animation demonstration teaching method and wearable BRAIN-machine interface device intelligent classroom teaching in the curriculum reform of colleges and universities.

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