Abstract
The literature on affective factors in the learning of mathematics is difficult to interpret because of differences and inconsistencies in terminology and measurement. To advance research in this field of affect, I compare and clarify terminology, and reconcile scales for measurement by examining the factors and research instruments targeted by four research teams. The findings reveal two distinct broad primary areas of interest, namely self-concepts about mathematics, and intrinsic motivations for learning mathematics. The instruments used to measure a range of underlying factors within these two areas are analysed and reconciled, terminology is clarified, and further recommendations are made.