“…Several preschool educational intervention programs have attempted to reverse such difficulties by providing parents with requisite skills and abilities to foster their children's cognitive and language development (Karnes, Teska, Hodgins and Badger, 1970;Jason, Clarfield and Cowen, 1973;Levenstein, 1970;Risley, Reynolds and Hart, 1970;Schaefer, 1969). Typically these educational programs have provided parents stimulating educational materials, cognitive strategies for breaking complex lessons into simpler components, and ways of rewarding children's successive approximations.…”