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Direct linkWong, Terry T.-Y.; Ho, Connie S.-H.; Tang, Joey – Journal of Learning Disabilities, 2017
Developmental dyscalculia (DD) is a specific learning disability in mathematics that affects around 6% of the population. Currently, the core deficit of DD remains unknown. While the number sense deficit hypothesis suggests that the core deficit of DD lies in the inability to represent nonsymbolic numerosity, the access deficit hypothesis suggests…
Descriptors: Learning Disabilities, Mathematics Skills, Numeracy, Low Achievement
Skagerlund, Kenny; Träff, Ulf – Journal of Learning Disabilities, 2016
This study investigated if developmental dyscalculia (DD) in children with different profiles of mathematical deficits has the same or different cognitive origins. The defective approximate number system hypothesis and the access deficit hypothesis were tested using two different groups of children with DD (11-13 years old): a group with…
Descriptors: Learning Disabilities, Cognitive Ability, Number Concepts, Mathematics Skills
Peer reviewedKerr, Andrew S. – Journal of Learning Disabilities, 1972
The effects of grade level, achievement level, and sex were studied in the examination of determinants of visual-motor coordination and visual-perceptual reasoning in elementary school children. (KW)
Descriptors: Academic Achievement, Age Differences, Elementary School Students, Perceptual Motor Coordination
