Dyscalculie et modèles développementaux du calcul - Resodys

Dyscalculics may fail on some ofthese basic tests• CW– Degree in psychology;postgraduate qualifications;always very bad at maths atschool; finds shoppingextraordinarily difficult.Takes 4-5 times as long asnormals adding single digits;cannot subtract two digitnumbers. Always calculateson his fingers (which makesmultiplication hard).• Turner Syndrome(45X,m)– Very slow simplearithmetic, may failGCSE– High-functioning,good language andreading, A-level mathsin some cases– Compensated dyslexicButterworth, B. (1999). The mathematical brain. London: Macmillan.Charles vs controls: dot enumeration700060005000RT ms40003000Charles RandCont. RandCharles Can.Cont. Can2000100001 2 3 4 5 6 7 8 9 10Number of dots20