This book, written for both seasoned and novice researchers, presents a theory of what is called Basic and Higher Language Cognition (BLC and HLC), a theory aimed at making some fundamental issues concerning first and second language learning and bilingualism (more) empirical. The first part of the book provides background for and explication of…

This chapter takes a critical look at complexity in L2 research. We demonstrate several problems in the L2 literature in terms of how complexity has been defined and operationalised as a construct. In the first part of the chapter we try to unravel its highly complex, multidimensional nature by presenting a taxonomic model that identifies major…

This chapter will present a research synthesis of a series of studies, termed here the Ealing research. The studies use the same general framework to conceptualise tasks and task performance, enabling easier comparability. The different studies, although each is self-contained, build into a wider picture of task performance. The major point of…