Respect to both chronological age and MLU controls (Bishop 1994 EyerĪnd Leonard 1994 Leonard et al. Previous research on the acquisition of past tense in children withĪ number of studies report that children with SLI have considerableĪnd protracted difficulties in the marking of regular past tense with How the input that children with SLI are exposed to on a daily basis may Samples with an experimenter, there is little information available on The spontaneous data available, typically consisting of thirty-minute Moreover, because of the nature of the experimental tasks and of Slower rate must be examined in more detail (Rice et al. Language later than it is typically observed but also develop at a The fact that children with SLI not only start producing Time is a variable that must be incorporated to a greater extent in theĬomparison of children with SLI and typically developing youngerĬontrols. Younger children with SLI may not be very different from MLU controls. Not necessarily be the case at earlier stages of development that is, Unaffected children has widened to a significant degree, while this may By ageįive and above it is possible that the gap between children with SLI and It is important to consider whether younger children with SLI mayīe more similar to their MLU controls than their older peers are. Although significant differences have been reportedįor older children with SLI when compared to MLU controls, there is noĬlear sense of how children with SLI start out in the acquisition Time however, information is now needed on the earlier stages of past Invaluable for the understanding of how children with SLI develop over The data gathered using older children are Methodology is typically cross-sectional involving the elicitation of All of the studiesĪvailable to date include children with SLI aged five and older and the 1995 Oetting and Horohov 1997 Montgomery and Leonard 1998 RiceĮt al. A body ofįindings is beginning to emerge that characterizes the performance ofĬhildren with SLI as delayed with respect to language-matched typicallyĭeveloping children on a number of measures (Leonard et al. Has recently been the subject of considerable interest. Language impairment (SLI) as compared with typically developing children The acquisition of past tense morphology in children with specific Infinitive account, and the single-mechanism account are discussed. Tense acquisition such as the surface account, the extended optional The implications of these results for models of past Used by the children and those used by the eleven mothers of the MLUĬontrol children. The SLI and the MLU groups between the most frequent past tense forms A positive correlation was, however, found in both Observed either in the period prior to overregularization or after This held true for both the controlĬhildren and the children with SLI. Investigations, these younger children's attempts at markingįiniteness in past tense contexts were not significantly better for Present study indicated that, contrary to previously reported Whinney 2000) to form an unaffected control group. ForĬomparison purposes eleven MLU-matched children were selected from the These children wereĪudiorecorded for an hour in free play sessions with their mothers atįortnightly intervals for a period of approximately ten months. The study, formed the basis of the investigation. SLI, two boys and one girl, aged 3 1, 3 5, and 4 0 at the beginning of Impairment (SLI) and unaffected controls. The main aim of this study was to provide an analysis of theĪcquisition of past tense in preschool children with specific language
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