title: Construct validity of the Comprehensive Developmental Inventory for Infants and Toddlers.
abstract: BACKGROUND
  The aim of this study was to investigate the construct validity of the diagnostic test, the Comprehensive Developmental Inventory for Infants and Toddlers (CDIIT).
  
  
  METHODS
  A total of 1085 children in four age groups (infant, 1-year-old, 2-year-old, preschool age) were enrolled. The Developmental Quotient of each subdomain of the five CDIIT subtests (Cognition, Language, Motor, Social, and Self-help) was used as the basic unit for factor analysis with the iterative principle factor method and promax rotation.
  
  
  RESULTS
  The two-factor solution in two younger age groups and 2- or 3-factor solutions in the 2-year-old and preschool groups provided superior factor structure in terms of interpretability and compatibility with existing child development theories.
  
  
  CONCLUSIONS
  Although five constructs were proposed in the original manual of CDIIT, two to three constructs were revealed in this empirical study.
authors.affiliation: Graduate Institute of Early Intervention, College of Medicine, Chang Gung University, Tao-Yuan, Taiwan.
authors.forename: Ai-Wen
authors.initials: AW
authors.lastname: Hwang
authors.forename: Li-Jen
authors.initials: LJ
authors.lastname: Weng
authors.forename: Hua-Fang
authors.initials: HF
authors.lastname: Liao
mesh_terms: D000203:Activities of Daily Living; D002657:Child Development; D002675:Child, Preschool; D003071:Cognition; D002658:Developmental Disabilities / Q000175:diagnosis*; D005260:Female; D006801:Humans; D007223:Infant; D018730:Infant Behavior; D007804:Language Development; D008297:Male; D011597:Psychomotor Performance