caa a22 4500 386359571 CHVBK 20180307111911.0 cr unu---uuuuu 161130e198910 xx s 000 0 eng 10.1017/S0305000900010710 doi S0305000900010710 pii (NATIONALLICENCE)cambridge-10.1017/S0305000900010710 Genetic factors in the ontogeny of spoken language: evidence from monozygotic and dizygotic twins [Elektronische Daten] Recent controversy about the innateness of language has awakened interest in the genetic basis of linguistic development. In this study, we analysed more extensively data from Mather & Black (1984).in order to test the hypothesis that the speech articulation of monozygotic (MZ) twins would be qualitatively more similar than that of age- and sex-matched dizygotic (DZ) twins. Analyses revealed that 4-year-old MZ twin pairs were significantly more likely to misproduce the same sounds on an articulation test than were DZ twin pairs, and that DZ twins were no more likely to share errors than were children who were both genetically and environmentally unrelated. There was no evidence that MZ twins made more similar errors than DZ twins, and indeed it was difficult to make this determination since only broad categories of error (substitution, distortion, omission) were available for analysis. The greater amount of genetic material shared by MZ twins, and the presumably more similar morphology of their speech mechanisms, may have caused certain sound patterns to be of more nearly equal difficulty for both members of a MZ pair. However, these findings need to be confirmed with phonetically more detailed analyses. Copyright © Cambridge University Press 1989 Locke John L. MGH Institute of Health Professions, Boston, Massachusetts and Harvard Medical School Mather Patricia L. Northeastern Illinois University Journal of Child Language Cambridge University Press 16/3(1989-10), 553-559 0305-0009 16:3<553 1989 16 JCL https://doi.org/10.1017/S0305000900010710 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0305000900010710 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Locke John L. MGH Institute of Health Professions, Boston, Massachusetts and Harvard Medical School NATIONALLICENCE 700 1- Mather Patricia L. Northeastern Illinois University NATIONALLICENCE 773 0- Journal of Child Language Cambridge University Press 16/3(1989-10), 553-559 0305-0009 16:3<553 1989 16 JCL CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge