A delay in expressive language in children with Down Syndrome (DS) is common, and often a major challenge of the condition. This study aimed to investigate the early expressive vocabulary skills of Maltese children with DS, whose first languages were either Maltese or English, while taking into account chronological age. Language preference was further explored in the context of a bilingual env...

The production of the grammatical morphemes studied by Brown and his colleagues was examined in free speech samples from a cohort of 4-year-olds with a history of slow expressive language development (SELD) and a control group of normal speakers. Results suggest that children with SELD acquire morphemes in an order very similar to that shown in previous acquisition research. Children who were s...

We present a compositional approach to defining expressive logics for coalgebras of endofunctors on Set. This approach uses a notion of language constructor and an associated notion of semantics to capture one inductive step in the definition of a language for coalgebras and of its semantics. We show that suitable choices for the language constructors and for their associated semantics yield lo...