Abstract
The authors fonnulated three research questions in association with the development of a test in 3-dimensional geometry in response to Mariotti' s study on the complexity in mental imaging using nets of solids. This paper reports on the coding of responses to a question on nets, using two frameworks, the SOLO Taxonomy and the van Hiele levels of understanding. The findings show that students' descriptions of nets can he coded in both frameworks, thus supporting the three research questions.
Christine Lawrie & John Pegg