Numerical matching judgments in children with mathematical learning disabilities

Area of Science:

• Cognitive Psychology
• Developmental Neuroscience
• Educational Psychology

Background:

• Mathematical learning disabilities (MLD) are often explained by representation or access deficits.
• Numerical magnitude comparison tasks are commonly used but may involve decision processes.
• Numerical matching tasks offer an alternative to study number processing without decision confounds.

Purpose of the Study:

• To investigate representation and access deficit hypotheses in children with MLD.
• To utilize a numerical matching task to circumvent decision process confounds.
• To compare performance of children with MLD and matched controls on symbolic and non-symbolic numerical tasks.

Main Methods:

• Employed a numerical matching task with symbolic (digits) and non-symbolic (dot-arrays) stimuli.
• Included mixed notation trials (dot-array and digit) and non-symbolic trials (two dot-arrays).
• Compared reaction times between children with MLD and age, gender, and IQ-matched controls.

Main Results:

• Children with MLD were significantly slower than controls on mixed notation trials.
• No significant difference in reaction times was observed between groups on non-symbolic trials.
• Results suggest difficulties in linking numerical symbols to their representations in children with MLD.

Conclusions:

• Findings support the access deficit hypothesis for mathematical learning disabilities.
• Children with MLD appear to have trouble connecting symbolic number representations with their quantities.
• Further research is needed to rule out potential deficits in integrating information across different notations.