Abstract
Research findings from extensive task-based interviews with introductory calculus students are discussed. The research was conducted from a constructivist perspective. Students' sources of conviction were the focus of analysis, with sources of conviction referring to how one determines mathematical truth and validity. The existence and characteristics of three groups of calculus learners were revealed: Collectors, Technicians, and Connectors. The groups differed in the nature and role of their sources of conviction and manner of construction of calculus conceptualizations.
SANDRA D FRID
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