The study investigated the concurrent validity of the Peabody Picture Vocabulary Test-Revised and Expressive One-Word Picture Vocabulary Test with the Wechsler Preschool and Primary Scale of Intelligence for 15 language delayed and 36 non-language delayed children (ages 45 to 76 months). (DB)

Forty-eight preschool-age children were administered the Kaufman Assessment Battery for Children-Nonverbal Scale and the Wechsler Preschool and Primary Scale of Intelligence (WPPSI) Performance Scale. Pearson product-moment correlations between the two scales ranged from .59 for a language-delayed group to .79 for the entire sample. Subjects…

The WPPSI was used in a Manhattan, N.Y., public school because administrators, teachers, and parents had asked for help in understanding children who had difficulty in learning to read well, despite special efforts to help them. A preventive intervention program was begun based on a clinical study of every first grader. Forty children were…

Based on Vygotsky's notion of the zone of proximal development, this study aimed to determine the extent to which parents' teaching of children become less directive as a function of children's age and communicative status and to describe relations between parents' interaction styles and children's verbal I.Q. One hundred and twenty families…