Analysis of pedigrees from parents of 69 preschool children who stuttered revealed that more male than female relatives ever stuttered but that female subjects who stuttered had more female relatives who ever stuttered than did male subjects. Segregation analyses suggest that transmission of a single major genetic locus increases the liability to…

Fifty-seven same-sex twin sets (32 monozygotic and 25 dizygotic) were examined for concordance of speech and language disorders. Monozygotic twins had a higher concordance than dizygotic twins and also were more similar in the types of disorders they presented than dizygotic twins. Positive family histories were reported for both groups.…

This article reviews and critiques the research on possible genetic factors in stuttering. The failure to consider epidemiologic factors is thought to have biased previous research, but recent data provide evidence that spontaneous recovery and chronicity are influenced by genetic factors. Findings support previous conclusions about combined…

This study found that narratives of 41 parents of 29 autistic children were similar in length to controls' narratives but were less complex and less coherent. A subgroup of the parents produced either skeletal or rambling narratives, consistent with the hypothesis of a genetic liability for mild forms of autism that include impaired language…

This study examined the abilities of 18 adults with familial dyslexia to use steady state, dynamic, and temporal cues in synthetic speech continua. Although subjects were able to label and discriminate the continua, they did not necessarily use acoustic cues in the same manner as did normal readers, and their overall performance was less accurate.…

Analysis of characteristics of 53 children with specific language impairment (SLI), ages 4 to 9, suggested that family history is related to pattern of language performance. Children with deficits in only expressive language had a higher proportion of affected family members than did children with both expressive and receptive language deficits.…

This study assessed the family history of speech, language, and school problems in 62 young children (mean age 28 months) with developmental expressive language delay (ELD). Comparison with normally developing children indicated no strong familial component of ELD. (Author/DB)

This follow-up to a longitudinal speech and educational outcome study compared 24 adults (and their children) with history of moderate phonological-language disorder and 28 adults (and their children) with normal articulation as children. Children of the proband subjects performed significantly more poorly on all tests of articulation and…