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arXiv · 1601.01314

Development and Evaluation of a Tutorial to Improve Students' Understanding of a Lock-in amplifier

Seth DeVore·Alexandre Gauthier·Jeremy Levy·Chandralekha Singh
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Abstract

A lock-in amplifier is a versatile instrument frequently used in physics research. However, many students struggle with the basic operating principles of a lock-in amplifier which can lead to a variety of difficulties. To improve students' understanding, we have been developing and evaluating a research-based tutorial which makes use of a computer simulation of a lock-in amplifier. The tutorial is based on a field-tested approach in which students realize their difficulties after predicting the outcome of simulated experiments involving a lock-in amplifier and check their predictions using the simulated lock-in amplifier. Then, the tutorial provides guidance and strives to help students develop a coherent understanding of the basics of a lock-in amplifier. The tutorial development involved interviews with physics faculty members and graduate students and iteration of many versions of the tutorial with professors and graduate students. The student difficulties with lock-in amplifiers and the development and assessment of the research-based tutorial to help students develop a functional understanding of this device are discussed.

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Seth DeVore, Alexandre Gauthier, Jeremy Levy, Chandralekha Singh. 2016-01-06. Development and Evaluation of a Tutorial to Improve Students' Understanding of a Lock-in amplifier. https://doi.org/10.1103/physrevphyseducres.12.020127

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