Treagust, D. F., A. Chandrasegaran, J. Crowley, B. H. Yung, I. Cheong, and J. Othman. 2010.“Evaluating Students' Understanding of Kinetic Particle Theory Concepts Relating to the States of Matter, Changes of State and Diffusion: A Cross-National Study.”International Journal of Science and Mathematics Education 8: 141-164.