Twigger, D., Byard, M., Draper, S., Driver, R., Hartley, R., Hennessy, S., Mallen, C., Mohamed, R., O'Malley, C., O'Shea, T., & Scanlon, E. (1991). The ‘Conceptual Change In Science’ project. Journal of Computer Assisted Learning, 7(2), 144-155. https://doi.org/10.1111/j.1365-2729.1991.tb00238.x