Concurrent and predictive validity of the cognitive adaptive test/clinical linguistic and auditory milestone scale (CAT/CLAMS) and the Mental Developmental Index of the Bayley Scales of Infant Development

Clin Pediatr (Phila). 2003 Jun;42(5):427-32. doi: 10.1177/000992280304200507.


The Cognitive Adaptive Test/Clinical Linguistic and Auditory Milestone Scale (CAT/CLAMS) was designed for use by primary pediatric health care providers to identify children with developmental delays. This study assesses the concurrent and predictive validity of CAT/CLAMS developmental quotient (DQ) scores and the Mental Developmental Index (MDI) of the Bayley Scales of Infant Development in healthy children without risk factors for developmental delay. Overall CAT/CLAMS DQ scores correlated significantly with Bayley MDI scores at both 12 (r = 0.393; p = 0.008) and 30 months (r = 0.742; p = 0.0001) of age. Overall CAT/CLAMS DQ scores at 12 months of age also correlated modestly with Bayley MDI scores at 30 months of age (r = 0.181; p = 0.036). Despite its modest predictive validity at 12 months, its satisfactory concurrent validity plus its ease and speed of administration make the CAT/CLAMS a reasonable choice for assessment of early development by primary pediatric health care providers.

Publication types

  • Evaluation Study
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.
  • Validation Study

MeSH terms

  • Child Development / physiology
  • Cognition Disorders / diagnosis*
  • Cohort Studies
  • Developmental Disabilities / diagnosis*
  • Developmental Disabilities / epidemiology
  • Female
  • Humans
  • Infant
  • Intellectual Disability / diagnosis
  • Intellectual Disability / epidemiology
  • Language Disorders / diagnosis
  • Language Disorders / epidemiology
  • Language Tests*
  • Male
  • Neuropsychological Tests*
  • Predictive Value of Tests
  • Psychomotor Performance / physiology
  • Reproducibility of Results
  • Sensitivity and Specificity
  • Severity of Illness Index