These two volumes present the methodology and results of an international research project on second language acquisition. The project studied the structure and success of the acquisition process in adult learners, and the explanatory factors behind these phenomena. It places the study of second languages and inter-ethnic discourse on a firm empirical footing. Volume I explains and evaluates critically the research design adopted by the project. Volume II summarizes the crosslinguistic results.

These two volumes present the methodology and results of an international research project on second language acquisition. The project studied the structure and success of the acquisition process in adult learners, and the explanatory factors behind these phenomena. It places the study of second languages and inter-ethnic discourse on a firm empirical footing. Volume II summarizes the crosslinguistic results.