Linguistic repetitions in children are conceptualized as negative in children with autism – echolalia, without communicative purpose – and positive in typically developing (TD) children – linguistic alignment involved in shared engagement, common ground and language acquisition. To investigate this apparent contradiction we analyzed spontaneous speech in 67 parent–child dyads from a longitudinal corpus (30 minutes of play activities at 6 visits over 2 years). We included 32 children with autism and 35 linguistically matched TD children (mean age at recruitment (...) 32.76 and 20.27 months). We found a small number of exact repetitions in both groups (roughly 1% of utterances across visits), which increased over time in children with autism and decreased in the TD group. Partial repetitions were much more frequent: children reused caregivers' words at high rates regardless of diagnostic group (24% of utterances at first visit), and this increased in frequency (but not level) over time, faster for TD children (at final visit: 33% for autism, 40% for TD). The same happened for partial repetition of syntax and semantic alignment. However, chance alignment (as measured by surrogate pairs) also increased and findings for developmental changes were reliable only for syntactic and semantic alignment. Children with richer linguistic abilities also displayed a higher tendency to partially re–use their caregivers' language (alignment rates and semantic alignment). This highlights that all children commonly re–used the words, syntax, and topics of their caregivers, albeit with some quantitative differences, and that most repetition was at least potentially productive, with repeated language being re–contextualized and integrated with non–repeated language. The salience of echolalia in ASD might be partially explained by slight differences in frequency, amplified by lower semantic alignment, persistence over time, and expectations of echolalia. More in–depth qualitative and quantitative analyses of how repetitions are used and received in context are needed. (shrink)

This study explores the emergence and productivity of word order usage in Mandarin-speaking typically-developing children and children with autism spectrum disorder, and examines how this emergence relates to frequency of use in caregiver input. Forty-two caregiver-child dyads participated in video-recorded 30-min semi-structured play sessions. Eleven children with ASD were matched with 10 20-month-old TD children and another 11 children with ASD were matched with 10 26-month-old TD children, on expressive language. We report four major findings: Preschool Mandarin-speaking children with ASD (...) produced word order structures with pervasive ellipsis at similar rates to language-matched TD children, but also displayed differences from TD children in their usage of SVt and VtO frames; Grammatical productivity was observed in both TD children and children with ASD; moreover, children with ASD with higher expressive language produced less stereotyped language; Both TD children and children with ASD heard a range of word orders in their caregivers’ input, with TD children’s input greater in amount and complexity; however, caregivers of both groups also showed no age/language-related changes in word order usage; Few word-order-specific correlations emerged between caregivers and their children; however, strong correlations were observed for mean length of utterances for both groups: Caregivers who produced longer/more complex utterances had children who did the same. Taken together, it seems that despite their pragmatic deficits, the early grammatical knowledge of word order in Mandarin-exposed children with ASD is well preserved and in general follows the typical developmental pattern. Moreover, caregiver input is broadly rather than finely tuned to the linguistic development of TD children and children with ASD, and plays a more important role in children’s general syntactic development than in specific word order acquisition. Thus, early word order usage in preschool Mandarin-speaking TD children and children with ASD may be influenced by both caregiver input and child abilities. (shrink)

Bloom's theory of word learning has difficulty accounting for children's verb acquisition. There is no predominant preverbal event concept, akin to the preverbal object concept, to direct children's early event-verb mappings. Children may take advantage of grammatical and linguistic information in verb acquisition earlier than Bloom allows. A distinction between lexical and grammatical learning is difficult to maintain for verb acquisition.

In this review, we summarize studies investigating comprehension of three core grammatical structures (Subject-Verb-Object word order, grammatical aspect and wh-questions) in diverse samples of Mandarin-acquiring preschoolers with ASD, all utilizing the Intermodal Preferential Looking (IPL) paradigm. Results showed that children with ASD, though they were delayed in chronological age and expressive language (including significantly lower vocabulary production scores), acquired various grammatical constructions similarly to their typically developing peers. Moreover, Mandarin-acquiring preschoolers with ASD demonstrated similar acquisition patterns of these three core (...) grammatical structures, as has been reported in previous IPL studies among English-acquiring children with ASD (Naigles & Fein, 2017). Thus, the results testify that universal underlying mechanisms are playing vital roles in grammatical acquisition of children with ASD across languages (e.g., the setting of word order parameters, the preservation of functional morphemes, the universal operation of WH-Movement), despite their pervasive social cognition impairments. These findings suggest that core grammatical knowledge may be preserved in children with ASD, even in the face of radical differences in language environment and social/communicative deficits, supporting the contribution of the language faculty in autistic language acquisition. The results shed light on the sharp contrast between linguistic competence (governed by the internal computational system of the language faculty) vs. linguistic performance (affected by loci of impairment in the sensory-motor and the conceptual-intentional interfaces) in ASD. Furthermore, the results highlight the dissociation between the lexical vs. the grammatical modules in ASD, supporting a modular view of the diverse language domains in the language faculty. (shrink)