title: Mathematical learning difficulties subtypes classification.
authors.affiliation: Department of Primary Education, Research Center of Psychophysiology and Education, National and Kapodistrian University of Athens Athens, Greece.
authors.forename: Giannis
authors.initials: G
authors.lastname: Karagiannakis
authors.affiliation: Department of Education and Human Sciences, University of Modena and Reggio Emilia Reggio Emilia, Italy.
authors.forename: Anna
authors.initials: A
authors.lastname: Baccaglini-Frank
authors.affiliation: Department of Primary Education, Research Center of Psychophysiology and Education, National and Kapodistrian University of Athens Athens, Greece.
authors.forename: Yiannis
authors.initials: Y
authors.lastname: Papadatos
keywords: core deficits; dyscalculia; internal representation of numbers; mathematical learning difficulties; multi-deficit model; number sense