It has long been noted that verb phrase (VP) ellipsis cancels the polarity sensitivity of the English Positive Polarity Items (PPIs). In recent work, it has been proposed that words for disjunction are governed by a parameter. On one value of the parameter, disjunction is a PPI for adult speakers of many languages including Mandarin Chinese. On the other value, disjunction is interpreted in situ. It has also been proposed that child language learners, across languages, initially interpret disjunction in situ, not as a PPI. Taken together, these proposals predict that child and adult speakers of Mandarin will assign the same interpretation to disjunction in sentences with VP ellipsis, but will assign a different interpretation in sentences without VP ellipsis. This study assessed these predictions. In sentences with a full VP, the adult participants analyzed disjunction as a PPI, but they interpreted disjunction in situ in sentences with VP ellipsis. The child participants interpreted disjunction in situ in sentences of both kinds. Together, the findings support the recent proposal that disjunction is governed by a lexical parameter, with a default setting.

This study investigates the effects of early second-language (L2) acquisition on introduction of characters in narrative discourse by comparing 5- and 7-year-old monolingual (first-language [L1] = Turkish) and bilingual (L1 = Turkish, L2 = English) children. Turkish does not have a grammaticalized article system like English which enables to investigate specific influences. The findings revealed that monolingual and bilingual children used similar forms while introducing characters; however, for the Frog character, bilingual children used more appropriate referencing compared to monolinguals. These findings were discussed within the effects of L2 on L1 in terms of introducing characters as well as the amount of exposure to L2.

This research analyzed adequacy of referential expressions in the narratives of bilingual and monolingual children with Developmental Language Disorder (DLD) and typical language development (TLD), aiming to shed light on the relative contribution of morpho-syntactic, discourse-pragmatic, and semantic constraints. Narratives were collected from 51 children using a storytelling procedure ( MAIN – Multilingual Assessment Instrument for Narratives). Participants were 18 bilingual Russian-Hebrew preschool children (8 with DLD), 17 monolingual Russian speakers (9 with DLD), and 16 monolingual Hebrew speakers (5 with DLD) aged 5;6–6;7. Referential expressions were coded for form (noun phrase [NP] or pronoun) and character function (Introduction or Maintenance). Analyses addressed the effects of proficiency group (TLD/DLD), language group (bilingual/monolingual), and language (Russian/Hebrew) on inadequate pronoun use and definiteness. Results demonstrated that children in all groups introduced characters using NPs. Children with DLD used more morpho-syntactically inadequate pronouns, such as incorrect gender, while both children with DLD and those with TLD used similar numbers of discourse-pragmatically inadequate pronouns. Bilinguals used more morpho-syntactically inadequate pronouns than monolinguals. In Hebrew, bilingual children with DLD omitted definite articles for character Maintenance more frequently than bilingual children with TLD and monolingual Hebrew-speaking children with DLD. Wrong gender assignment indicates that children with DLD have difficulties with morpho-syntactic constraints. Omission of definite articles for character Maintenance indicates a possibility of both morpho-syntactic and semantic difficulties that bilingual children with DLD acquiring Hebrew face. The results offer insight into the nature of the difficulty observed in bilingual children with DLD in using referential expressions.

Previous research found a beneficial effect of augmentative signs (signs from a sign language used alongside speech) on spoken word learning by signing deaf and hard-of-hearing (DHH) children. The present study compared oral DHH children, and hearing children in a condition with babble noise in order to investigate whether prolonged experience with limited auditory access is required for a sign effect to occur. Nine- to 11-year-old children participated in a word learning task in which half of the words were presented with an augmentative sign. Non-signing DHH children ( N = 19) were trained in normal sound, whereas a control group of hearing peers ( N = 38) were trained in multi-speaker babble noise. The researchers also measured verbal short-term memory (STM). For the DHH children, there was a sign effect on speed of spoken word recognition, but not accuracy, and no interaction between the sign effect in reaction times and verbal STM. The hearing children showed no sign effect for either speed or accuracy. These results suggest that not necessarily sign language knowledge, but rather prolonged experience with limited auditory access is required for children to benefit from signs for spoken word learning regardless of children’s verbal STM.

This study investigated whether we can find reliable comprehension-to-production syntactic priming effects in children aged 2;0 to 2;11 and how phonological working memory and sentence production skills relate to the syntactic priming process. A finding of reliable syntactic priming effects would provide strong evidence that children’s syntactic representations are abstracted over individual lexical items. To test children at this young age, they were primed with simple and early-acquired transitive (e.g., tickling (a) baby) and unergative intransitive (e.g., running) syntactic structures. Children aged 2;7 to 2;11, primed with alternating prime structures, revealed a reliable syntactic priming effect. In addition, phonological working memory (moderated by age) and sentence production skills positively affected transitive productions. Children aged 2;0 to 2;6, primed either with alternating or cumulative prime structures, showed no priming effect. Together, the data indicate that children have robust abstract syntactic representations for the tested structures before age three and that both phonological working memory and production skills relate to children’s syntactic priming behavior, albeit in different ways.

The present study examines the development of the earliest type of complex predicates to emerge in child Hebrew – extended predicate constructions. These constructions take the form of a modal/aspectual operator followed by an infinitival verb form (e.g., roce lesaxek ‘want to.play’), and since they serve various discursive functions (e.g., intent, desire, request), their use marks a significant development in toddlers’ cognitive, linguistic, and conversational abilities. Focus here is on the three most common modal operators used in extended predicates in early child Hebrew: roce ‘want’, yaxol ‘can’, and carix ‘need/have.to’. Analyses cover all uses of these three predicates by both children and adults, in longitudinal weekly-recorded speech samples from three Hebrew-acquiring children, starting with the earliest verb forms produced by each child and lasting for a period of over a year (age range: 1;3–2;5). Findings show the following developmental trends: (a) roce ‘want’ emerges the earliest and continues to be the most frequent of the three predicates throughout the year; (b) children favor using roce, yaxol, and carix as main predicates before they start integrating them in extended-predicate contexts; (c) early adult uses of extended predicates in child-directed speech are almost exclusively in the form of Yes/No verification questions (e.g., ata roce laševet? ‘you want to.sit?’); and (d) as children gradually use more extended predicates, adults gradually use fewer Yes/No verification questions, and more prompts that elicit information from the children (e.g., ma ata roce la’asot? ‘what (do) you want to.do?’) while also expanding more on the children’s productions. These concurrent trends show that such complex predicates develop in a piecemeal fashion, promoted by both the gradually evolving relations between children’s linguistic productions and their discursive functions, and the supportive contexts provided by their adult interlocutors.

High rates of error and variability in early word production may signal speech sound disorder. However, there is little consensus regarding the degree of error and variability that may be expected in the typical range. Relatedly, while variables including child age, word frequency and word phonological neighbourhood density are associated with variance in word production accuracy and variability, such effects remain under-examined in spontaneous speech. This study measured the accuracy and variability of 234,551 spontaneous word productions from five typically developing children in the Providence corpus (0;11–4;0). Using Bayesian regression, accuracy and variability rates were predicted by age, input frequency, phonological neighbourhood density, and interactions between these variables. Between 61% and 72% of word productions were both inaccurate and variable according to strict criteria. However loosening these criteria to accommodate production inconsistencies unlikely to be considered erroneous (e.g. the target /æləɡeɪtəɹ/ pronounced /ælɪɡeɪtəɹ/) reduced this figure to between 10% and 17%, with the majority of word productions then classed as accurate and stable (48%–58%). In addition, accuracy was higher and variability was lower in later months of sampling, and for high frequency words and high density words. The author discusses the implications of these results for future research and the differential diagnosis of speech sound disorder, and presents an explanatory account of findings emphasizing the development of oral-motor skills and increasingly detailed phonological word representations.

Mental state terms are believed to be closely related to the development of Theory of Mind (ToM). This study focuses on mental state verbs (MSVs) and investigates how they are used by Japanese-speaking mother–child dyads compared to their English-speaking counterparts. Analyses of their spontaneous speech from the CHILDES archives show that children’s production of MSVs is greatly influenced by the mothers’ input in both languages and that Japanese MSVs are used less frequently than English MSVs in both the children’s and mothers’ utterances. In addition, the syntactic properties of MSVs show that complements under MSVs tend to be null in Japanese, whereas those in English are more likely to be overtly expressed. This difference observed in the mothers’ input and children’s production can be a contributing factor underlying the developmental delay of ToM in Japanese.

This article investigates verbal short-term memory (vSTM) and verbal working memory (vWM) abilities and their relation to lexical and syntactic abilities in monolingual (mono-) and bilingual (bi-) children with Developmental Language Disorder (DLD) and typical development (TD). The authors employed the following tasks: vSTM (non-word repetition and forward digit span), vWM (backward digit span), receptive vocabulary, syntactic production (sentence repetition) and syntactic comprehension (relative clauses, reflexives and passives). While the mono- and bi-DLD groups underperformed the mono- and bi-TD groups respectively in all tasks, the two clinical groups differed only in receptive vocabulary. vSTM was a significant predictor of syntactic performance for both monolinguals and bilinguals, while vWM was a significant predictor of syntactic performance only for bilinguals. These findings suggest that impairments in vSTM, wVM and syntax are core clinical features in DLD, and that vWM makes a greater contribution to syntax in bilinguals than in monolinguals.