[The effect of the pandemic on language development in the first two years of life].

Background and objectives: The effects that the COVID-19 pandemic may have had on the language development of children are still poorly understood. In this study, we examine the effect of the pandemic on this development by analyzing the vocabulary and the morphosyntactic level in a sample of toddlers. Participants and method: One hundred and fifty-three boys and girls between 18 and 31 months of age participated in the study. Of these participants, 82 were born and evaluated before the pandemic (PRE group) and the other 71 were born during the pandemic and were evaluated at the end of the 2021/2022 academic year, the last academic year in which restrictive measures derived from the pandemic were maintained in the schools (POST group). Both groups were matched by age and mother's educational level and attended nursery schools with similar socioeconomic characteristics. Results: We found lower scores both in vocabulary and morphosyntactic development in the POST group than in the PRE group. These findings are consistent with the scarce previous studies on children's language development during the pandemic. Conclusions: The measures adopted during the COVID-19 pandemic have had a negative impact on the language development of children under 3 years of age. It is necessary to pay special attention to these children due to the needs they may require in the immediate future.