Shymansky, J.A., Treagust, D.F., Thiele, R.B., Harrison, A.G., Waldrip, B.G., Stocklmayer, S.M., & Venville, G.J. (1993, April). A study of changes in high school students' understanding of selected concepts in physics. 66th Annual Meeting of the National Association for Research in Science Teaching, Atlanta, Georgia.