Assessment of calculation and number processing using the EC301 battery: Cross-cultural normative data and application to left- and right-brain damaged patients

To provide referential normative data on simple tasks dealing with number p rocessing and calculation which could be used in clinical investigations, 5 51 normal volunteers aged between 18 and 69 years from France and Belgium ( n = 180). Italy (n = 212) and Germany (n = 159), performed the 31 task,, wh ich constitute the EC301 calculation Differences between countries ere sign ificant for 10 tusks and a Gender X and number processing battery Education interaction was observed for some tasks, with men performing better than w omen among subjects with low education only. To present an overview of pres erved and impaired calculation and number processing abilities in left-brai n damaged (LBD) aphasic patients and right-brain damaged (RBD) nonaphasic p atients, the 31 subtests of the EC301 battery were proposed to 80 patients with cerebrovascular accident. 56 left and 24 right, for most case,., in th e territory of the middle cerebral artery. LBD aphasic patients showed low performance on oral and and mental alphabetical spoken verbal and written h erbal counting, transcoding when a written code was involved or written cal culation but relatively good performance at finding the number of elements in small sets. comparing numbers written in the Arabic digital code and pla cing correctly number.,, on an analogue number line. The lowest performance s of RBD patients were observed for estimation tasks,. and for placing a nu mber on a scale. Results. and their implication,, for further research are discussed according to the present information processing and anatomofuncti onal models of calculation and number processing.