Explaining learner variation
The objective of this chapter is to explain learner variation as described in Chapter 2 using the processability framework outlined in Chapters 3 and 4. We will focus on two aspects: (1) the limited structural range within which interlanguage variation occurs and (2) the steadiness of learner language across tasks. We will then summarize an empirical study supporting these claims. In the last section of this chapter, we will show how the PT-based view of learner variation can make a contribution towards understanding the stabilization of learner language.