This study is the first to explore microdevelopment in sociolinguistic evaluative judgments of standard German and Austro‐Bavarian dialect by adult second language learners of German by using dense time serial measurements. Intensive longitudinal data (10 observations per participant) were collected from four learners at approximately weekly intervals over 3 months. We employed generalized additive models with superimposed periods of significant change to identify rapid developmental phases in individual developmental trajectories. By triangulating these models with qualitative introspective and retrodictive interview data, we identified environmental and psychological stimuli for change. Learners evinced increasing and decreasing periods of significant change, independent of length of residence. Dynamic constellations of identity‐ and agency‐related variables alongside more intensive social interaction with target‐variety speakers contributed to significant changes. We discuss findings from a complexity perspective and advocate for microlongitudinal studies in variationist second language acquisition to better capture stimuli for change in learners’ emerging multivarietal repertoires.

中文翻译：

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第二语言社会语言能力发展的特征动态：来自深入微纵向研究的证据

本研究首次利用密集时间序列测量来探索成年德语第二语言学习者对标准德语和奥地利巴伐利亚方言的社会语言学评价判断的微观发展。在 3 个月内，大约每周一次从四名学习者那里收集密集的纵向数据（每个参与者 10 次观察）。我们采用具有显着变化叠加周期的广义加法模型来识别个体发展轨迹中的快速发展阶段。通过将这些模型与定性内省和回顾性访谈数据进行三角测量，我们确定了变革的环境和心理刺激。学习者表现出显着变化的时间增加和减少，与居住时间长短无关。身份和机构相关变量的动态组合以及与目标品种说话者更密集的社交互动促成了重大变化。我们从复杂性的角度讨论研究结果，并提倡对变异第二语言习得进行微纵向研究，以更好地捕捉学习者新兴的多元技能变化的刺激。