The radical exemplar model resonates with work on perceptual classification and categorization highlighting the role of exemplars in memory representations. Further development of the model requires acknowledgment of both the fleeting and fragile nature of perceptual representations and the gist-based, good-enough quality of long-term memory…

In this commentary, the author defends the Multiple Grammars (MG) theory proposed by Luiz Amaral and Tom Roepe (A&R) in the present issue. Topics discussed include second language acquisition, the concept of developmental optionality, and the idea that structural decisions involve the lexical dimension. The author states that A&R's…

The central claim in Amaral and Roeper's (this issue; henceforth A&R) keynote article is that everyone is multilingual, whether they speak one or more languages. In a nutshell, the idea is that each speaker has multiple grammars or "sub-sets of rules (or sub-grammars) that co-exist". Thus, rather than positing complex rules to…

In her valuable commentary, Kerkhoff raises several issues, both empirical and conceptual. In particular, she argues that morphophonological regularities represented in associative memory might suffice for the acquisition of French grammatical gender. She thus questions whether a default implemented as a rule is necessary and whether it is even…

This article questions how two very similar sets of experiments can yield such very different findings, and comments on the differences between the studies. Here Annamarie Kerkhoff presents a commentary on some perceived differences between the studies in areas such as age groups and group sizes evaluated. Kerkhoff also comments on some…

Jurgen Meisel argues that "grammatical variation...can be described...in terms of parametric variation", and--crucially for his arguments in this paper--that "parameter settings do not change across the lifespan". To this extent he adopts the standard generative view, but he then departs from what he calls "the literature on historical…

There is a long linguistic tradition in which language change is explained in terms of first language acquisition. In this tradition, children are considered to be the agents of language change, or at least the agents of changes in the underlying grammar. Since the early 1980s, this has been formulated in the (generative) terminology in terms of…

While formal research into the effect various technologies have on vocabulary acquisition is still in its infancy, it is clear that--intentionally or incidentally--students have used various electronic media to learn new words for some time now. Moreover, although it is still far from clear exactly how one acquires vocabulary in a second language…

The five papers in this issue cover a range of perspectives on the acquisition and use of the Spanish copulas "ser" and "estar" in a variety of contexts, including language contact, bilingual language acquisition, and classroom second language learning. The fact that these papers cite work in this area as far back as the early part of the 20th…

Lidz et al. [Lidz, J., Waxman, S., & Freedman, J. (2003). What infants know about syntax but couldn't have learned: Experimental evidence for syntactic structure at 18 months. Cognition, 89, B65-B73.] claim experimental substantiation of an argument from the poverty of the stimulus, in the sense of Pullum and Scholz [Linguist. Rev. 19 (2002) 9].…

Twenty-four caregivers and their 2- to 4-year-old children took part in a storybook reading task in which caregivers taught children novel labels for familiar objects. Findings indicate parental speech could provide a rich source of information to children in learning how different lexical categories are expressed in their native language.…

The concept of input to the language learner is examined with reference to some current theorizing about language processing and the idea of modular systems of knowledge. It is argued that exposure to a second language engages the learner in a whole battery of different processing mechanisms. (21 references) (Author/LB)

In this paper, we reconsider some of the processes that distinguish production and comprehension. In particular, we discuss the specific forms of thinking involved in each: "thinking for speaking" and "thinking for listening" (Black and Chiat, 2000; Slobin, 1996). We argue that thinking for speaking (or for any form of language output) crucially…

Acquisition by Processing Theory (APT) is a unified account of language processing and learning that encompasses both L1 and L2 acquisition. Bold in aim and broad in scope, the proposal offers parsimony and comprehensiveness, both highly desirable in a theory of language acquisition. However, the sweep of the proposal is accompanied by an economy…

Based upon the view that parents, home visitors, and teachers in early childhood settings need tools for empowering young children to develop language, this paper examines what adults need to know to guide young children's language development and presents 20 suggestions for enhancing language growth. The paper maintains that adults need to know…