Principal Identifying Features of the Syndrome of Nonverbal Learning Disabilities in Children

The identifying features of the syndrome of nonverbal learning disabilities (NLD) were examined with a view to determining their relative discriminant validity. A stepwise linear discriminant function analysis of children with NLD (n = 29), children with reading and spelling disabilities (Group R-S; n = 27), and a group of nonclinical children (NC; n = 27) on 15 neuropsychological variables yielded a subset of scores on four tests (Target Test; Trail Making Test, Part B; Tactual Performance Test; and Grooved Pegboard Test) that accurately (>95%) discriminated the NLD group from the R-S and NC subjects. Of the neuropsychological features of NLD described by Rourke (1987, 1988b, 1989), deficits in visual-perceptual-organizational psychomotor coordination and complex tactile-perceptual skills appeared to be most representative (in the sense of most discriminative) of the NLD syndrome in the children examined. These are also the dimensions that are considered to be “primary” in the NLD model (Rourke, 1989). Replication of these results, employing children with other clinical disorders, is necessary.

[1]  E. Goldberg,et al.  Hemisphere differences in the acquisition and use of descriptive systems , 1981, Brain and Language.

[2]  J. Casey,et al.  Syndrome of nonverbal learning disabilities: Age differences in neuropsychological, academic, and socioemotional functioning , 1991, Development and Psychopathology.

[3]  J. M. Fletcher,et al.  Linear Discriminant Function analysis in Neuropsychological Research: Some Uses and abuses , 1978, Cortex.

[4]  B. Rourke.  Syndrome of nonverbal learning disabilities: The final common pathway of white-matter disease/dysfunction? , 1987 .

[5]  R. Reitan,et al.  Clinical neuropsychology: Current status and applications. , 1974 .

[6]  B. Rourke,et al.  Subtypes of learning disabled children implications for a neurodevelopmental model of differential hemispheric processing , 1988 .

[7]  B. Rourke,et al.  Neuropsychological Significance of Variations in Patterns of Academic Performance: Motor, Psychomotor, and Tactile-Perceptual Abilities , 1978 .

[8]  N M Thompson,et al.  Cerebral white matter and cognition in hydrocephalic children. , 1992, Archives of neurology.

[9]  B. Rourke.  Socioemotional disturbances of learning disabled children. , 1988, Journal of consulting and clinical psychology.

[10]  B. Rourke,et al.  Central processing deficiencies in children: toward a developmental neuropsychological model. , 1982, Journal of clinical neuropsychology.

[11]  D. Tranel,et al.  Evidence for a right‐hemisphere developmental learning disability , 1987 .

[12]  B. Rourke.  Brain--behavior relationships in children with learning disabilities. A research program. , 1975, The American psychologist.

[13]  L. Bérubé,et al.  [Clinical neuropsychology]. , 1982, Nursing Quebec.

[14]  B. Rourke,et al.  Prediction of the reading and spelling performances of normal and retarded readers: A four-year follow-up , 1977, Journal of abnormal child psychology.

[15]  L. Baker.  Nonverbal learning disabilities: the syndrome and the model. , 1992, Journal of child and adolescent psychopharmacology.

[16]  Lloyd M. Dunn.  Expanded manual for the Peabody picture vocabulary test , 1965 .

[17]  M. Mesulam,et al.  Developmental learning disabilities of the right hemisphere. Emotional, interpersonal, and cognitive components. , 1983, Archives of neurology.

[18]  R. Wagner,et al.  The nature of phonological processing and its causal role in the acquisition of reading skills. , 1987 .

[19]  B. Rourke,et al.  Concept-formation/non-verbal reasoning abilities of children who exhibit specific academic problems with arithmetic. , 1983 .

[20]  K. Stanovich.  Explaining the Differences Between the Dyslexic and the Garden-Variety Poor Reader , 1988, Journal of learning disabilities.

[21]  J. Fletcher,et al.  Neurobehavioral effects of brain injury in children. , 1988 .

[22]  Isabelle Y. Liberman,et al.  Phonology and reading disability : solving the reading puzzle , 1989 .

[23]  B. Rourke,et al.  Arithmetic Disabilities, Specific and Otherwise , 1993, Journal of learning disabilities.

[24]  B. Rourke,et al.  Psychological Dimensions of Learning Disability Subtypes: Neuropsychological Studies in the Windsor Laboratory. , 1992 .

[25]  W. Yule.  Child Neuropsychology. An Introduction to Theory, Research, and Clinical Practice , 1985 .

[26]  Kenneth M. Adams,et al.  Linear Discriminant Analysis in Clinical Neuropsychology Research , 1979 .

[27]  B. Rourke,et al.  The syndrome of nonverbal learning disabilities: developmental manifestations in neurological disease, disorder, and dysfunction , 1988 .

[28]  K. Voeller.  Right-hemisphere deficit syndrome in children. , 1986, The American journal of psychiatry.

[29]  M. Finlayson,et al.  Neuropsychological significance of variations in patterns of academic performance: Verbal and visual-spatial abilities , 1978, Journal of abnormal child psychology.

[30]  R. Reitan.  A Research Program on the Psychological Effects of Brain Lesions in Human Beings1 , 1966 .