The influence of biological, social, and developmental factors on language acquisition in pre-term born children

The objective of this study is to evaluate language outcome in pre-term children, considering multiple factors. The hypothesis is that early communicative capacity (preverbal communicative utterances) are affected mainly by biological (prematurity, birth weight and gender) and social factors (maternal education), while more advanced linguistic abilities (i.e. combinatorial and syntactic abilities) are mostly influenced by previously acquired communicative abilities. Eighteen monolingual Italian pre-term children (birth weight between 750 and 1600 gr, gestational age ≤ 37 weeks; 13 males and 5 females) were compared with a control group of eighteen age-matched full-term children (8 males 10 females). The longitudinal design comprised motor and cognitive assessment at 14 and 36 months, and communicative evaluation by direct observation at 14, 24, 30 and 36 months, and by indirect observation at 24 and 30 months. Main results evidenced: delayed development in pre-term compared to full-term children, particularly after 24 months of age; intra-individual differences in the pre-term group; a strong effect of prematurity on communicative ability at 14 and 24 months; however, more advanced communicative developmental stages are influenced both by prematurity and by previously acquired linguistic skills.