Nature of phonological delay in children with specific language impairment.

This study investigated the nature of phonological delay in a group of children with specific language impairment. It was asked whether phonological errors in this group of children were generated by a slow but normal language learning process or whether they reflected a selective impairment in some representations that enhance normal acquisition and use of a language phonology. A group of 10 children with SLI (mean age = 5.1) was compared with three groups of normal children who were matched in age (age control group, mean age = 5.1), in sentence comprehension and recalling (grammar control group, mean age = 3.7), or who exhibited a phonological performance lower than the age average (group with low phonological performance, mean age = 4.4). The four groups of children were assessed in terms of: (1) responses to a mispronunciation detection task; and (2) error profiles with complex and simple syllabic structures. Performance on the mispronunciation detection task showed that the group with SLI could distinguish a target lexical item from acoustic non-word stimuli that were highly similar to it in terms of phonetic characteristics. An analysis of overall error rate at this task showed, however, that four children with SLI had a much lower performance than normal children of the same age, even when the auditory stimuli were tokens of the target word, or non-words that were phonetically different from the target. A difficulty in coordinating vocal actions in an articulatory plan accounted for error profiles with simple syllabic structures both for some children with SLI and normal children with phonological performance lower than the age average. A severe difficulty with representing complex syllabic structures was a homogeneous characteristic of the group with SLI and worked as the main indicator of impaired, rather than simply slow, phonological development.

Re-introduction of referents in Italian children's narratives.

In this study we investigate the re-introduction of referents in the Frog stories told by Italian children aged 4-10 (N = 100). We found that for every age group full nouns are the most frequent forms used for reference re-introduction. Null forms, such as clitic pronouns or person/number inflection on the verb, are the second most frequent forms. A detailed analysis of null forms shows that children of different ages exploit different properties of the verbal and non-verbal context which can make a referent predictable. Compared to preschoolers, elementary school children are more likely to use null forms when the semantic content of the verb, or the structure of the preceding text make referents inferrable. On the other hand, preschoolers tend to exploit the importance of a character in the story plot, or the visual availability of the referent in the non-verbal context, as properties that make an entity salient enough to prevent the speaker from using overt linguistic forms such as full nouns. Our study confirms results of previous research, showing that elementary school children are more competent than preschoolers in integrating the semantic content of the current utterance into the context generated by previous discourse.

Uses of past forms in the social pretend play of Italian children.

In different languages children have been found to use past verb forms to express the meaning of 'unreality' during social pretend play. In this study, the verb forms used by 14 four-year-old Italian children in their pretend play were investigated. Results show that different Italian past verb forms tend to co-occur with different play activities. The imperfect occurs mainly when children plan and negotiate their pretend activities and marks the transition from a real to a pretend frame of reference. The present perfect occurs mainly when children implement their plans and communicate within a pretend frame that has already been established. Results of this study are discussed in comparison with findings on the pretend language of children speaking other languages.