| Wiedenbeck, S. (1989). Learning iteration and recursion from examples. International Journal of ManMachine Studies, 30, 1-22. |
....and unique invocations of subprograms in recursion (the copies model) and more importantly the flow of control in an executing recursive program. Novices easily adopt the more familiar notion of iteration when attempting to understand recursion (Kessler Anderson 1986; Kurland Pea 1983; Wiedenbeck, 1989). In Kahney s study, students were not explicitly taught how to simulate the flow of execution control and visualise separate invocations of subprograms. They were only required to comment on whether the solution programs given would work and did not seemed to have used any diagrammatic drawings ....
Wiedenbeck, S. (1989). Learning iteration and recursion from examples. International Journal of ManMachine Studies, 30, 1-22.
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