This chapter takes a system view on second language (L2) development. However, unlike proponents of Complex Dynamic Systems Theory (CDST) viewing the developmental system as ever dynamic without a finite state, we take up a long-standing observation about a signature L2 phenomenon, inter-learner differential attainment, and theorize about its ontology. Drawing on a fundamental physics law, the Law of Conservation of Energy – importantly, not only conceptually but also mathematically – we lay out the key parameters and their interactional relationship in engineering L2 differential attainment. The parameters include aptitude, motivation, L2 input, and L1-TL distance, all of them interacting over time vis-à-vis the developmental positioning of the learner once s/he enters the field of learning, another concept key to the system view we expound in this chapter. The resulting theory, Energy Conservation Theory in L2 or ECT-L2, promises broad descriptive, explanatory, and predictive powers. We discuss the theory in conjunction with CDST, arguing for their complementarity.
Article outline
Introduction
Complex system, complexity theory, and L2 development
An SLA-unique phenomenon and key variables
Energy conservation in L1A (ECT-L2)
Scenario A
Scenario B
Scenario C
A close-up of interconnectedness and self-adaptation
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