What is mathematical learning disability (MLD)? The reviews in this special issue adopt different approaches to defining the construct of MLD. Collectively, they demonstrate the current status of efforts to establish a consensus definition and the challenges faced in this endeavor. In this commentary, we reflect upon the proposed pathways to…

Many educational and psychological survey questionnaires contain item response categories which may have different meanings to different people. Students who had previously answered Pace's College Student Experiences questionnaire by checking one of four response categories (i.e. never, occasionally, often, very often) were selected to obtain a…

Much research and many publications have dealt with the concepts of rural-urban differences, but the controversy regarding the conceptual clarity of the variables remains. Assuming that these variables need clarification, this paper: (1) examines some of the conceptual and methodological problems involved in rural-urban differentiation, (2)…