The neuropsychological approach to studying learning disabilities (LD) has produced two extreme positions: the view of LD as (1) homogeneous and unitary and (2) as a pattern of unique and idiosyncratic characteristics. Resulting classification approaches for determining subtypes of the population have important implications for assessment and…

The identifying features of nonverbal learning disabilities (NLD) were evaluated with 29 NLD children, 27 children with reading and spelling disabilities, and 27 nonclinical children. Four tests were found which accurately discriminated the NLD group from the others. Deficits in visual-perceptual-organizational psychomotor coordination and complex…

Four studies involving 45 subjects found that children (ages 9-14) with nonverbal learning disabilities syndrome exhibited specific patterns of impairment in mechanical arithmetic and in psychosocial functioning, whereas children with poor performance in reading and spelling exhibited patterns of academic deficits (including arithmetic), but not…