• Draper, N. R., & Smith, H. (1966). Applied regression analysis. New York: Wiley.
  • Kim, H. J., Hann, A. C., & Shayer, M. (1992). Accelerating the development of concrete and formal thinking in Korean primary school students. Manuscript submitted for publication.
  • Preece, P. T. R., & Boulanger, F. D. (1983). The calculation of effect size in meta-analysis of research. Journal of Research in Science Teaching, 20, 183184.
  • Shayer, M., & Adey, P. (1992). Accelerating the development of formal thinking in middle and high school students II: Postproject effects on science achievement. Journal of Research in Science Teaching, 29, 8192.
  • Tukey, J. W. (1977). Exploratory data analysis. Reading, MA: Addison-Wesley.