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Numerical abilities in children with hemiplegia

Numerical abilities in children with hemiplegia. Catherine THEVENOT & Joël FLUSS University of Geneva, Switzerland. Cape Town , South Africa – July 2012. Fingers. Constitute aids to represent numbers. Help keeping track of number words in counting.

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Numerical abilities in children with hemiplegia

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  1. Numericalabilities in childrenwith hemiplegia Catherine THEVENOT & Joël FLUSS University of Geneva, Switzerland Cape Town, South Africa – July 2012

  2. Fingers Constituteaids to representnumbers Help keeping track of number words in counting Allow the comprehension of the 10-base numerical system Help for basic arithmetic operations Functionalrole in the development of numericalabilities? Manumerical cognition hypothesis

  3. Manumerical cognition hypothesis Digital discrimination in 5- to 6-year-old children are better predictors of mathematical abilities than more classic intelligence tests (Fayol, Barrouillet & Marinthe, 1998) Training digital discrimination improves performance in numerical abilities (Gracia-Baffaluy & Noel, 2008; but see Fischer 2010) But isthere a functionallink ? Do numericalabilitiesreallydevelopfromfingerdiscrimation and use ?

  4. The structural view Finger representations rely on the same brain area than number processing There is no causal link between fingers and numbers but the relationship is due to the proximity of the brain areas

  5. Structural vs. Functionalviews Hemiplegicchildren cannot use one of their hands Numericaldifficulties Functionalhypothesis: Numericaldifficulties in symbolicnumericaltask but not in non-symbolictasks Structural hypothesis: Numericaldifficulties in symbolic and non-symbolictasks

  6. Structural vs. Functionalviews Hemiplegicchildren cannot use one of their hands Numericaldifficulties Functionalhypothesis: Numericaldifficulties in symbolicnumericaltask but not in non-symbolictasks Structural hypothesis: Numericaldifficulties in symbolic and non-symbolictasks

  7. The experiment Children : 10 7- to 11-year-oldchildrenwith hemiplegia 10 control children Tasks : Non-symboliccomparisontask

  8. The experiment Children : 10 7- to 11-year-oldchildrenwith hemiplegia 10 control children Tasks : Spontaneousfinger use in countingtask It isnice to behere in South Africa

  9. The experiment Children : 10 7- to 11-year-oldchildrenwith hemiplegia 10 control children Tasks : Fingerdiscrimation

  10. The experiment Children : 10 7- to 11-year-oldchildrenwith hemiplegia 10 control children Tasks : Finger pattern recognition

  11. The experiment Children : 10 7- to 11-year-oldchildrenwith hemiplegia 10 control children Tasks : Countingtask

  12. The experiment Children : 10 7- to 11-year-oldchildrenwith hemiplegia 10 control children Tasks : Symboliccomparison 9 7 Thursday Saturday

  13. Results PRESERVED DAMAGED Non-symboliccomparison Finger discrimination Spontaneousfinger use Finger pattern recognition Counting Numbercomparison Day comparison (both hands)

  14. Conclusions Childrenwith hemiplegia presentdifficultieswithfinger discrimination, fingercounting, finger pattern recognition Theypresentdifficultieswithsymbolicnumericalactivities But no difficultywith non-symbolicnumericalactivities It is not because the brain area devoted to fingerrepresentations

  15. Conclusions It is not because the brain area devoted to fingerrepresentationsisdamagedthat all numberactivites are damaged This contradicts the structural hypothesis But favors the functional one postulatingthatsymbolicnumericalabilitiesdevelopfromfinger discrimination and use

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