Flight Physics Concept Inventory (FliP-CoIn)

Developed by Florian Genz & Kathleen Ann Falconer


To assess students’ understanding of flight physics concepts (lift, drag, stall, center of mass) using naïve student concepts as distractors.

Format Multiple-choice
Duration 28 min
Focus Mechanics Content knowledge (fluid dynamics, aviation)
Level Upper-level, Intermediate, Intro college
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F. Genz and K. Falconer, Naïve concepts of aerodynamic lift – data lessons from different (learning) cultures, presented at the Physics Education Research Conference 2021, Virtual Conference, 2021.
External Resources

FliP-CoIn developer's website: https://zus.uni-koeln.de/flip-coin.html

more details
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 scope of the instrument was determined through expert interviews and the questions were refined based on expert feedback. The multiple choice responses were determined through student interviews, expert review, the literature and the developers teaching experience. Several rounds of think-aloud and focus group interviews with students were used to ensure the questions were understood as intended. In the final piloting study of over 270 university, students finished the survey without missing a single question. An item analysis resulted in a robust internal reliability (Chronbach α = .81) of the final questions and gave insights to item difficulty. 


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The latest version of the FliP-CoIn, released in 2017, is version 1. A short and simplified version for high school is under development. Contact florian.genz@uni-koeln.de for more info.