Citation

Shepard LA, Smith ML, Vojir CP. Am. Educ. Res. J. 1983; 20(3): 309-331.

Copyright

(Copyright © 1983, American Educational Research Association, Publisher SAGE Publishing)

DOI

10.3102/00028312020003309

PMID

unavailable

Abstract

This study was aimed at describing the characteristics of school-aged children whom educators had identified as learning disabled (LD). A probability sample of 800 was selected from the population of all children served as learning disabled in the state of Colorado. A coding form was used by trained coders to extract relevant features from the case files of the children. The sample was characterized by (1) distributions of single variables (e.g., below grade level achievement, discrepancy between IQ and achievement, medical indicators), and (2) hierarchical classification creating clusters or subgroups within the LD sample. Fewer than half the sample exhibited characteristics consistent with definitions of LD in federal regulations and professional literature. Included in this group were subgroups of hyperactive, brain-injured children, children with significant discrepancies between IQ and achievement and those with signs of perceptual processing disorders. Slightly more than half the sample did not match conventional definitions of LD but exhibited learning problems such as language interference, emotional disorders, or mild retardation. The inclusion of the latter groups among the learning disabled is a particular problem in the validation of the construct and will confound research on prevalence rates and treatment efficacy.