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The Relation between Age and Mean Length of Utterance in Morphemes

1981; American Speech–Language–Hearing Association; Volume: 24; Issue: 2 Linguagem: Inglês

10.1044/jshr.2402.154

1558-9102

Jon F. Miller, Robin S. Chapman,

Child Development and Digital Technology

No AccessJournal of Speech, Language, and Hearing ResearchResearch Note1 Jun 1981The Relation between Age and Mean Length of Utterance in Morphemes Jon F. Miller, and Robin S. Chapman Jon F. Miller University of Wisconsin-Madison Google Scholar More articles by this author and Robin S. Chapman University of Wisconsin-Madison Google Scholar More articles by this author https://doi.org/10.1044/jshr.2402.154 SectionsAboutPDF ToolsAdd to favoritesDownload CitationTrack Citations ShareFacebookTwitterLinked In The relationship between child age and mean length of utterance measured in morphemes (MLU) was studied in a sample of 123 middle- to upper-middle-class midwestern children, aged 17 to 59 months, conversing with mothers in free play. A significant correlation was found between age and MLU: r = .88. Age accounted for 78% of the variance when MLU was regressed on age; and MLU accounted for 77% of the variance when age was regressed on MLU. Significant nonlinear components accounted only for an additional 1% and 3% (respectively) of the variance. Ranges within one standard deviation (SD) were estimated for predicted MLUs and derived for predicted ages on the basis of linear regression. MLU increased at an average rate of 1.2 morphemes per year; predicted variability in predicted MLU increased with age. These findings can play a useful role in three activities when the children studied are from populations similar to the one sampled here, and MLUs are obtained in the same way. They can aid in (1) finding children whose development of productive syntax requires further diagnostic evaluation; (2) finding children at a particular linguistic stage quickly; and (3) predicting the age most likely to be associated with a given MLU. The substitution of local MLU norms, sampled from the population and ages of clinical interest, can further sharpen these evaluations. 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Some Reflections and One PerspectiveMargaret LaheyJournal of Speech and Hearing Disorders55:3 (468-475)1 Aug 1990The Identification of Language Impairment in the Selection of Specifically Language-Impaired SubjectsRebecca J. McCauley and M. J. DemetrasJournal of Speech and Hearing Disorders55:2 (251-261)1 May 1990Acoustic Validation of Phonological Knowledge and Its Relationship to TreatmentAnn A. Tyler, Mary Louise Edwards and John H. SaxmanPerspectives of the ASHA Special Interest Groups (1-10)Accuracy of Undergraduate Students' Language Sample Analysis in Online and Face-to-Face CoursesDana Bitetti Volume 24Issue 2June 1981Pages: 154-161 Get Permissions Add to your Mendeley library HistoryReceived: Oct 8, 1978Accepted: May 19, 1980 Published in issue: Jun 1, 1981 Metrics Topicsasha-topicsasha-article-typesCopyright & PermissionsCopyright © 1981 American Speech-Language-Hearing AssociationPDF downloadLoading ...