“…While similar findings had been reported with children who do not have disabilities prior to these findings (e.g., Ainsworth & Bell, 1975;Elardo, Bradley & Caldwell, 1975;Stern et al, 1969;Lewis & Goldberg, 1969), this research was the first to document this effect with children with Down syndrome and other disabilities. These findings were provocative because they contradicted the prevailing methodologies that were being used in early cognitive and language interventions (Bailey & Wolery, 1984), many of which are still being used today (e.g., Guralnick, 1997).…”