2020
DOI: 10.31234/osf.io/5dmhs
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The quandary of diagnosing mathematical difficulties in a generally low performing population

Abstract: Brazilian students’ mathematical achievement was repeatedly observed to fall below average levels ofmathematical attainment in international comparison studies such as PISA. In this article, we argue thatthis general low level of mathematical attainment interferes with the diagnosis of developmentaldyscalculia when the psychometric criterion is used: establishing of an arbitrary cut-off (e.g., performance< percentile 10) may lead to misleading diagnoses. Therefore, the present study set off to evaluate … Show more

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