title: An empirical comparison of formulas evaluating early intervention program impact on development.
mesh_terms: D002657:Child Development; D002675:Child, Preschool; D004314:Down Syndrome / Q000534:rehabilitation; D004495:Education of Persons with Intellectual Disabilities / Q000592:standards; D006801:Humans; D007223:Infant; D008607:Intellectual Disability / Q000534:rehabilitation*