Interactive tutorial system for linear circuit analysis: Impact on learning and novel tutorials
Interactive tutorial system for linear circuit analysis: Impact on learning and novel tutorials
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线性电路分析交互式教程系统：对学习的影响和新颖的教程
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
D. Robinson
中科院分区：
文献类型：
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作者：
B. Skromme;X. Gao;Bhargav Korrapati;V. Seetharam;Yih;D. Robinson
本文介绍了线性电路分析教学系统的扩展和评价。该系统创建自己的电路问题（具有可变拓扑和元件值）供学生解决，沿着完整的示例解决方案。添加了新的教程模块，包括波形草图和拉普拉斯变换（共17个已发布模块）。前者涉及在基于网络的交互式界面中绘制波形作为时间的函数，要求学生在给定电流时（通过微分）找到电感器两端的电压，以及其他类似的问题。后者涉及直接和逆拉普拉斯变换从随机生成的各种类型的函数的计算，学生使用基于模板的交互式界面输入他们的方程进行检查。其他重要的功能也被添加，例如电压和电流分配方程，使用叠加生成电路解决方案，以及生成涉及开关的瞬态电路问题。波形草绘器还适于允许从系统响应函数草绘波特图，反之亦然。在2015年秋季进行了一次大型的课堂评估，约有70名学生将Circuit Tutor系统与广泛使用的基于商业模式的系统进行了比较。学生被随机分配使用一个系统进行节点分析作业，另一个系统进行网格分析作业，反之亦然。然后进行了一次课堂测验，比较学生的表现。学生们也对他们的偏好进行了调查。Circuit Tutor在0.72标准差的节点分析中发现了一个巨大的统计学显著优势[t（64）= 3.09，p < 0.05]（使用Circuit Tutor的学生平均得分为72%，而使用出版商系统的学生平均得分为49%）。对于网格分析，Circuit Tutor平均值为71%，而publisher系统为65%，但差异无统计学意义[t（64）= 0.88，p = 0.38]。该系统用于节点分析的更大优势可能是由于网格分析的本质更简单。在调查中，86%的人更喜欢Circuit Tutor，9%的人更喜欢出版商系统，94%的人认为Circuit Tutor更有效地教授他们使用它的主题，3%的人认为出版商系统更有效。巡回导师系统现在已经被8所不同学院和大学的54个班级的2300多名学生使用，普遍获得了非常好的评价。
The expansion and evaluation of a step-based tutoring system for linear circuit analysis is described. This system creates its own circuit problems (with variable topologies and element values) for students to solve, along with fully worked example solutions. New tutorial modules have been added, including waveform sketching and Laplace transforms (for a total of 17 released modules). The former involves the sketching of waveforms as a function of time in an interactive web-based interface, where students are required to find the voltage across an inductor when given its current (by differentiating), and other similar problems. The latter involves computation of direct and inverse Laplace transforms from randomly generated functions of various types, where students use an interactive template-based interface to enter their equations for checking. Other important capabilities have been added as well, such as voltage and current division equations, generation of circuit solutions using superposition, and generation of transient circuit problems involving switches. The waveform sketcher is further being adapted to permit sketching of Bode plots from system response functions, and vice versa. A large in-class evaluation was carried out in Fall 2015 with ~70 students to compare the Circuit Tutor system to a widely used commercial publisher-based system. Students were randomly assigned to either use one system for node analysis homework, and the other system for mesh analysis homework, or vice versa. An in-class quiz then compared student performance. Students were also surveyed on their preferences. A large, statistically significant [t(64) = 3.09, p < 0.05] advantage was found for Circuit Tutor on node analysis of 0.72 standard deviations (average score of 72% for students who used Circuit Tutor, compared to 49% for those who used the publisher system). For mesh analysis, the Circuit Tutor average was 71% vs. 65% for the publisher system, but the difference was not statistically significant [t(64) = 0.88, p = 0.38]. The larger advantage of this system for node analysis may be due to the fundamentally easier nature of mesh analysis. In the survey, 86% preferred Circuit Tutor and 9% preferred the publisher system, and 94% felt that Circuit Tutor more effectively taught them the topic for which they used it, and 3% felt that the publisher system was more effective. The Circuit Tutor system has now been used by over 2300 students in 54 class sections at eight different colleges and universities, with generally very favorable ratings.