Fifteen monozygotic and 22 dizygotic twin pairs, who were found to be lower in verbal ability than matched singletons at age two years, were compared at age nine years. Although twins still showed lower verbal ability, more variance in verbal ability was accounted for by the mothers' education and birth weight than by being a twin. (SLD)

In this study we examined early motor, vocal, and communicative development in a group of younger siblings of children diagnosed with autism (Infant Siblings). Infant Siblings and no-risk comparison later-born infants were videotaped at home with a primary caregiver each month from 5 to 14 months, with follow-up at 18 months. As a group, Infant…

Analysis of adult evaluation of children's linguistic output provides a basis for elaboration upon the work of McNeill (1970) and Brown (1970). When limited to the uttered words of a child paired with an utterance spoken at an earlier time, adults cannot judge the relative age of the children making those utterances; in fact, their predictions of…

In an attempt to explore a systematic approach to language expansion and improved sentence structure, echoic and modeling procedures for language instruction were compared. Four hypotheses were formulated: (1) children who use modeling procedures will produce better structured sentences than children who use echoic prompting, (2) both echoic and…

Investigates performance differences on receptive vocabulary and general verbal reasoning ability of 206 Hualapai Indian children. Results indicate Hualapai children score significantly lower on both measures of verbal ability when compared to national norms. Findings provide a long-needed archival record of the Hualapai's English language…

Three hundred twenty-six disadvantaged boys and girls in pre-kindergarten and kindergarten were pre- and post-tested in clay sculpturing, drawing and verbal cognitive abilities to determine whether teaching children through a non-verbal art medium, clay, would improve their verbal skills. Assessment instruments were developed. Children were…