Imperative Vs with distinctive morphology either have a distinctive syntax (Modern Greek, Spanish), or distribute like others Vs (Serbo-Croatian, Ancient Greek). The contrast follows from properties of the root C. The first type has a strong Imperative V-feature in C, and under Chomsky's Greed Principle, Imperative Vs raise overtly to check this feature. The second type is the Wackernagel language, whose C hosts no features, but V-features are in I. If no phrase fronts, Vs move to C to support second position items. V-to-C affects all Vs, is last resort, follows Lasnik's Enlightened Self-Interest, and escapes Greed.
This study investigates pronoun reference and verbs with nonactive morphology in high-functioning Greek-speaking children with Autism Spectrum Disorders (ASD). It is motivated by problems with reflexive pronouns demonstrated by English-speaking children with ASD and the fact that reflexivity is also expressed via nonactive (reflexive) verbs in Greek. Twenty 5-to 8-year-old children with ASD and 20 vocabulary-matched typically developing controls of the same age range completed a sentence-picture matching, an elicitation, and a judgment task. Children with ASD did not differ from controls in interpreting reflexive and strong pronouns but were less accurate in the comprehension of clitics and omitted clitics in their production. The findings render clitics a vulnerable domain for autism in Greek, and potentially for other languages with clitics, and suggest that this could be a consequence of difficulties in the syntax-pragmatics or the syntax-phonology interface. The two groups did not differ in the comprehension of nonactive morphology but were less accurate in passive than reflexive verbs. We argue that this is likely to stem from the linguistic representation associated with each type of verb, rather than their input frequency.
In order to study problems of individuals with Autism Spectrum Disorders (ASD) with morphosyntax, we investigated twenty high-functioning Greek-speaking children (mean age: 6;11) and twenty age- and language-matched typically developing children on environments that allow or forbid object clitics or their corresponding noun phrase. Children with ASD fell behind typically developing children in comprehending and producing simple clitics and producing noun phrases in focus structures. The two groups performed similarly in comprehending and producing clitics in clitic left dislocation and in producing noun phrases in non-focus structures. We argue that children with ASD have difficulties at the interface of (morpho)syntax with pragmatics and prosody, namely, distinguishing a discourse prominent element, and considering intonation relevant for a particular interpretation that excludes clitics.
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