Dyscalculia

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Dyscalculia is defined as a failure to achieve in mathematics commensurate with chronological age, normal intelligence, and adequate instruction. It is marked by difficulties with visualization;  visual-spatial perception, processing and discrimination;  counting;  pattern recognition;  sequential memory;  working-memory for numbers;  retrieval of learned facts and procedures;  directional confusion; quantitative processing speed;  kinesthetic sequences;  and perception of time.

Dyscalculia is known by several terms: 

     (1) Specific Learning Disability / Disorder in Mathematics (SLD-Math) 
     (2) Math Learning Disability (MLD)
     (3) Developmental Dyscalculia (DD)
     (4) Acalculia
     (6) Math Dyslexia
     (7) Math Anxiety
     (8) Numerical Impairment
     (9) Number Agnosia
     (10) Non-verbal Learning Disorder / Disability (NLD)


The Dyscalculia Syndrome, a paper by Renee M. Newman (1998).

Math Learning Disabilities, a paper by Kate Garnett, PhD (1998).