Abstract This article traces the evolution of the field of second language acquisition/development (SLA/SLD). It chronicles the evolution in terms of different disciplines and theories that have been influential, beginning with the origin of SLA/SLD in linguistic thinking and expanding its scope of inquiry to psycholinguistics. It has developed further with the disciplines of anthropology and sociology holding sway. More recently, newer cognitive theories have been influential. The article discusses the recent call for a transdisciplinary approach. More specifically, the author promotes the adoption of complex dynamic systems theory, in keeping with non-reductionist systems thinking. Not only is this sociocognitive theory an interdisciplinary theory, but it also highlights the dynamic, variable, nonlinear nature of second language development. This it does within an ecological conception of development, which insists on the relevance of context. It also maintains that SLA/SLD is not a matter of input becoming output, but rather that language patterns emerge from the interaction of its users, given the affordances that they perceive. The article concludes with a discussion of several instructional issues.

中文翻译：

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时代的第二语言发展：扩大我们的查询范围

摘要本文追踪了第二语言习得/发展（SLA / SLD）领域的发展。它从具有影响力的不同学科和理论开始，记录了语言学家SLA / SLD的起源，并将其探究范围扩展至心理语言学。它随着人类学和社会学学科的发展而进一步发展。最近，更新的认知理论已经产生了影响。本文讨论了最近对跨学科方法的呼吁。更具体地说，与非还原论者的系统思想保持一致，作者提倡采用复杂的动力系统理论。这种社会认知理论不仅是跨学科的理论，而且还强调了第二语言发展的动态，可变，非线性的性质。这是在生态发展观中实现的，该发展观坚持情境的相关性。它还坚持认为，SLA / SLD并不是输入变成输出的问题，而是在给定用户认可的条件下，语言模式是从其用户的交互中出现的。本文最后讨论了一些教学问题。