Is the discrepancy criterion for defining developmental disorders valid?

@article{Dyck2004IsTD,
  title={Is the discrepancy criterion for defining developmental disorders valid?},
  author={Murray J. Dyck and David Hay and Mike Anderson and Leigh M Smith and Jan Patricia Piek and Joachim F. Hallmayer},
  journal={Journal of child psychology and psychiatry, and allied disciplines},
  year={2004},
  volume={45 5},
  pages={979-95}
}
BACKGROUND Most developmental disorders are defined by an achievement discrepancy in which achievement on one or more specific abilities is substantially less than a person's measured intelligence. We evaluated the validity of this discrepancy criterion by assessing parameters that determine variability across abilities and by assessing relationships between achievement discrepancies and behavioral disturbances. METHODS Measures of intelligence, language, motor coordination, empathic ability… CONTINUE READING