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Updated: Jun 19, 2026

Multimedia Battery for Assessment of Cognitive and Basic Skills in Mathematics (BM-PROMA)
Published on: August 28, 2021
Operation-specific ERP dynamics of arithmetic processing in children with developmental dyscalculia
Qinfen Zhang1, Shiyan Ji1, Yuhao Wang1
1Children's Health Research Center, Changzhou Children's Hospital of Nantong University, 958 Zhongwu Avenue, Tianning District, Changzhou, Jiangsu, 213000, China.
Children with developmental dyscalculia (DD) exhibit slower and less accurate arithmetic processing. This inefficiency stems from delayed neural responses during early encoding and updating, particularly in subtraction tasks.
Area of Science:
- Neuroscience
- Developmental Psychology
- Cognitive Science
Background:
- Developmental dyscalculia (DD) presents persistent challenges in arithmetic skills.
- The precise temporal dynamics of operation-specific arithmetic processing in DD are not fully understood.
Purpose of the Study:
- To investigate the temporal dynamics of event-related potentials (ERPs) during addition, subtraction, and multiplication in children with and without DD.
- To identify operation-specific neural processing differences associated with DD.
Main Methods:
- Examined operation-locked ERPs in 76 children (37 with DD, 39 typically developing controls) aged 8-12 years.
- ERPs were time-locked to the second operand onset.
- Analyzed N1, P2, and N2a component latencies and amplitudes.
Main Results:
- Children with DD demonstrated lower accuracy and longer reaction times across all arithmetic operations.
- DD group showed prolonged N1, P2, and N2a latencies, with reduced N1/N2a and increased frontal P2 amplitudes.
- Subtraction tasks revealed the most significant temporal delays, especially in early ERP measures.
Conclusions:
- Developmental dyscalculia is characterized by temporal processing inefficiencies in arithmetic.
- These inefficiencies affect early symbolic encoding and intermediate information monitoring, particularly under high computational demand.
- Subtraction appears to be especially sensitive to these temporal processing deficits in DD.
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