Rotational Kinematics Inventory (RKI)

Developed by K K Mashood and Vijay A Singh Homi

Purpose To probe deficiencies in understanding and eliciting ill-suited reasoning pattern around rotational kinematics.
Format Multiple-choice
Duration 50-60 min
Focus Mechanics Content knowledge (Part 1: rotational kinematics of a particle, Part 2: rotational kinematics of a particle in rectilinear motion, Part 3: rotational kinematics of a rigid body about a fixed axis)
Level Intro college
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Sample questions from the RKI Part 1: Rotational Kinematics of a Particle

Sample question from RKI Part 2: Rotational Kinematics of a Particle in Rectilinear Motion: 

Sample question from the RKI Part 3: Rotational Kinematics of a Rigid Body About a Fixed Axis:

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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 multiple-choice questions on the RKI were developed based on a content mapping, cognitive analysis and literature review. The initial RKI questions were given to 50 students and 12 teachers, who were interviewed about their responses. The questions underwent expert review and then were given to an additional 50 students, who provided written explanations for each response. The RKI was then given to over 1200 high school and introductory college physics students in two countries, and over 50 teachers. Appropriate analyses of reliability, difficulty and discrimination were conducted and reasonable values found. The developers also conducted a item response curve analysis. The RKI has been given to over 1200 students and the results published in four peer-reviewed publications and one dissertation. 


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Language Translator(s)  
French Daniel Alawieh & Taan Mustafa

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Typical Results

Typical scores on the RKI from Mashood 2014:

The latest version of the RKI, released in 2015, is version 1.