Basic number processing and difficulties in single-digit arithmetic: evidence from Velo-Cardio-Facial Syndrome
Bert De Smedt1, Bert Reynvoet, Ann Swillen
1Centre for Disability, Special Needs Education, and Child Care, University of Leuven, Belgium. bert.desmedt@ped.kuleuven.be
Summary
Children with Velo-Cardio-Facial Syndrome (VCFS) exhibit mathematical disabilities due to impaired basic number processing. These deficits directly impact their arithmetic skills and strategy use.
Area of Science:
- Neuroscience
- Developmental Psychology
- Genetics
Background:
- Mathematical disabilities (MD) are often linked to foundational number processing deficits.
- Velo-Cardio-Facial Syndrome (VCFS) is a genetic disorder frequently associated with MD.
Purpose of the Study:
- Investigate basic number processing in children with VCFS.
- Determine if these skills predict single-digit arithmetic performance in VCFS.
- Examine number reading, comparison, and arithmetic strategy use.
Main Methods:
- Compared 25 children with VCFS to 25 matched controls (ages 6-12).
- Administered number reading, number comparison, and single-digit arithmetic tasks (addition, subtraction, multiplication).
- Recorded accuracy, speed, and strategy use during arithmetic tasks.
Main Results:
- Children with VCFS were slower in number comparison but not number reading.
- VCFS group showed poorer performance on large addition/subtraction problems; no differences in multiplication or small problems.
- VCFS group used backup strategies slower but retrieved arithmetic facts effectively.
Conclusions:
- Children with VCFS demonstrate deficits in number representation, arithmetic operations, and strategy use.
- These deficits suggest an impaired quantity subsystem.
- Basic number processing skills are crucial predictors of arithmetic performance and strategy selection in children with VCFS.
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