Essi Isohanni, Hannu-Matti Järvinen. Are visualization tools used in programming education?: by whom, how, why, and why not?. In Simon, Päivi Kinnunen, editors, Proceedings of the 14th Koli Calling International Conference on Computing Education Research, Koli, Finland, November 20-23, 2014. pages 35-40, ACM, 2014. [doi]
Abstract is missing.