Historically, first language acquisition research was a painstaking process of observation, requiring the laborious hand-coding of children's linguistic productions, followed by the generation of abstract theoretical proposals for how the developmental process unfolds.Recently, the ability to collect large-scale corpora of children's language exposure has revolutionised the field. New techniques enable more precise measurements of children's actual language input, and these corpora constrain computational and cognitive theories of language development, which can then generate predictions about learning behaviour.We describe several instances where corpus, computational, and experimental work have been productively combined to uncover the first language acquisition process and the richness of multimodal properties of the environment, highlighting how these methods can be extended to address related issues in second language research. Finally, we outline some of the difficulties that can be encountered when applying multi-method approaches and show how these difficulties can be obviated.Combining approaches in language acquisition 3
Combining Language Corpora with Experimental and Computational Approaches for Language Acquisition ResearchMultiple methods in language acquisition research are now well-established, although they have not been introduced without difficulty. In this paper, we describe the challenges of combining corpus, experimental, and computational approaches to research in first language acquisition. We discuss the benefits of multi-method approaches, andshow how these allow us to address fundamental questions in first language acquisition, with relevance to related issues in second language learning. Through three examples of successful combination of multiple methods, we illustrate these benefits, and suggest how some of the difficulties of their application may be circumvented for second language acquisition research.Historically, first language acquisition research has been dominated by attempts to describe formal mechanisms that can explain why children acquire the same language structures in the same order, despite great variation in the language environment (Chomsky, 1955;Pinker, 1984). Consequently, much effort in language acquisition research has focussed on determining the universal grammar that described the deep structure (or logical form) of children's linguistic constructions and how this is activated by exposure to a particular language (Chomsky, 1981). Similar arguments have been applied in second language acquisition research in terms of whether we need to posit an innately specified grammar to explain acquisition, or whether there is sufficient positive and negative evidence for the learner to be able to acquire the structure of the language Combining approaches in language acquisition 4 without innate structure (Ellis, 2013;Flynn, Martohardjono, & O'Neil, 1998;Hawkins, 2001;White, 1996).This theoretical approach has been largely unconcerned with combining multiple approaches to i...