Abstract
In the early 80s Mayberry (1981) developed a diagnostic instrument to be used to
assess the van Hiele levels of pre-service primary teachers. The test which was
carried out in an interview situation, was designed to examine seven geometric
concepts. The Mayberry study has been replicated as a written test under Australian
conditions. Analysis of the Australian results led to the identification of some
problems with the Mayberry test items which had the potential to lead to incorrect
assignment of a student's level of geometry. The analysis of these results was
reported earlier (Lawrie, 1993). The analysis also led to the identification of several
Level 4 Mayberry items which were seen as capable of assessing deductive skills.
This paper analyses the responses to three of these items and discusses how these
responses can be seen as indicators of a student's level of geometric reasoning.