A natural language sample of babble and words was obtained for 47 2-year-old children and compared with expressive language scores 5 months later. More than 50 percent of the variance in language outcome test scores was accounted for by rate of word use, rate of vowel babble, and behavior problems. (Author/DB)

The maladaptive behaviors, personality, and language skills of a male whose chromosome analysis showed evidence of mosaicism with karyotype 49,XXXXY and 48,XXXY are described. Research on severity of mental handicap with extra chromosomes, delayed speech development, and discrepancy between verbal and performance intelligence is examined. (JDD)

This study examined the relationship among language proficiency, behavior problems, and other areas of development in 36 children (ages 36 to 40 months). A strong association was found between deficiencies in both expressive and receptive language and behavioral difficulties. Specifically, deficits in expressive language at age 2 were more…