In this article, we aim to contribute to the debate about the use of subordination as a measure of language proficiency. We compare two theories of SLA-specifically, processability theory (PT; Pienemann, 1998) and dynamic systems theory (de Bot, Lowie, & Verspoor, 2007)-and, more particularly, their addressing of the development of subordinate clauses. Although DST uses measures from the complexity, accuracy, and fluency (CAF) research tradition (see Housen & Kuiken, 2009), PT uses the emergence criterion to describe language development. We will focus on the development of subordinate clauses and compare how subordination as such is acquired and how the processing procedures related to a specific subordinate clause word order is acquired in the interlanguage (IL) of second language German and Swedish learners. The learners' language use shows that the use of subordination (as measured by a subordination ratio) fluctuates extensively. From the beginning of data collection, all learners use subordinate clauses, but their use of subordinate clauses does not increase linearly over time, which is expected by DST. When focusing on processability and the emergence of subordinate clause word order, however, a clear linear developmental sequence can be observed, revealing a clear difference between the nonacquisition and the acquisition of the subordinate clause word order rules. Our learner data additionally reveal a different behavior regarding lexical and auxiliary or modal verbs.
SUBORDINATE CLAUSES IN L2 GERMAN AND L2 SWEDISH 3The Development of Subordinate Clauses in German and Swedish as L2s: A Theoretical
and Methodological ComparisonThe notion of developmental sequences can be considered as an accepted finding in second language acquisition (SLA) research (Long, 2007;VanPatten & Williams, 2007), the existence of which is supported by robust evidence over the past 40 years (see Abrahamsson, 2013;Meisel, 2013). A promising explanation for developmental sequences has been put forward by processability theory (PT; Pienemann, 1998Pienemann, , 2005, which presents itself as a psycholinguistic theory of second language (L2) development. According to PT, L2 learners go through separate developmental stages that are implicationally ordered.A recent challenge to this long-established finding, however, comes from the dynamic systems theory (DST) approach to SLA (de Bot, Lowie, & Verspoor, 2007). DST scholars assert that it is time to reconsider whether universal orders really exist, given the high amount of variability present in learner language. In fact, de Bot et al. (2007, p. 8) claim that "the outcome of development over time can therefore not be calculated exactly." In this paper, we aim to demonstrate, however, that in addition to variability, IL systems do follow a highly regular and predictable pattern. We will discuss what kind of measures and evidence two SLA theories (i.e., PT and DST) use to describe and predict learners' IL systems. Adopting such CAF measures as a way to investigate the dynamism ...