Physics Lab Inventory of Critical Thinking (PLIC)

Developed by N.G. Holmes, C.E. Weiman, K.N.Quinn, C.J. Walsh & the Cornell Physics Education Research Lab

Purpose To assess how students critically evaluate experimental methods, data, and models.
Format Pre/post, Multiple-choice, Multiple-response, Agree/disagree
Duration average is 20 min, no more than 30 min
Focus Lab skills (comparing measurements with uncertainty, evaluating data fitted to a model, generating and evaluating conclusions based on data, designing and evaluating experimental methods)
Level Upper-level, Intermediate, Intro college, High school

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PLIC Example

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PLIC Implementation Guide

Everything you need to know about implementing the PLIC in your class.

K. Quinn, C. Wieman, and N. Holmes, Interview Validation of the Physics Lab Inventory of Critical thinking (PLIC), presented at the Physics Education Research Conference 2017, Cincinnati, OH, 2017.
RESEARCH VALIDATION
Silver Validation
This is the second highest level of research validation, corresponding to at least 5 of the validation categories below.

Research Validation Summary

Based on Research Into:

  • Student thinking

Studied Using:

  • Student interviews
  • Expert review
  • Appropriate statistical analysis

Research Conducted:

  • At multiple institutions
  • By multiple research groups
  • Peer-reviewed publication

The questions on the PLIC came from an experiment conducted in an introductory physics lab, initially based on the series of questions an expert posed to themselves when conducting the experiment. These were then refined several times through think-aloud interviews with introductory and upper-division physics students (majors and non-majors), as well as through open-response question responses. The PLIC is still under development. 

References

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Typical Results

There are currently no published results for the PLIC, as it is underdevelopment. When you give the PLIC to your students using the developers online system, you will receive a report back with overall and question by question comparison data from other classes similar to yours.


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The latest version of the PLIC, developed in 2017, is version 1.