Third or Additional Language Acquisition examines research on the acquisition of languages beyond the L2 within four main areas of inquiry: crosslinguistic influence, multilingual speech production models, the multilingual lexicon and the impact of bi/multilingualism on cognitive development.

Gessica De Angelis is Assistant Professor of Applied Linguistics in the Centre for Language and Communication Studies at Trinity College Dublin, Ireland. She researches and publishes extensively within the areas of multilingualism, multilingual testing and assessment, crosslinguistic influence and language education. Among her works is Third or Additional Language Acquisition (2007, Multilingual Matters).