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The paper discusses studies on language in typical cognitive aging and dementia conducted on English language processing. For the most part, the studies on language in aging and dementia presented in the paper have been done with speakers of English. We describe language comprehension and production of two groups— typically aging individuals and individuals with dementia. We provide between group comparisons with regard to language comprehension and production and point out different levels of impairment affecting comprehension and production. Moreover, taking the findings of the studies into account, which observe language impairments as secondary to motoric, although they may constitute early markers of an undiagnosed condition (Kemper et al. 1995), it is tentatively proposed that content and function words need to be given special attention in analysing language comprehension and language production, respectively. At the same time, cognitive reserve through language learning and in the case of bilingual and multilingual speakers is proposed as a strategy to delay the onset of dementia (De Bot & Maconi, 2005). Finally, we discuss elderspeak and its impact on the quality of life of typically aging individuals and individuals with dementia. [ABSTRACT FROM AUTHOR]

A recurring hypothesis about the agreement phenomena generalized as closest‐conjunct agreement takes this pattern to result from reduced clausal conjunction, simply displaying the agreement of the verb with the nonconjoined subject of the clause whose content survives ellipsis (Aoun, Benmamoun & Sportiche 1994, 1999; see also Wilder 1997). Closest‐conjunct agreement is the dominant agreement pattern in the South Slavic languages Slovenian and Bosnian/Croatian/Serbian. A natural question is whether closest‐conjunct agreement in these varieties may indeed be analyzed as entirely derived from conjunction reduction. In this article, we report on two experiments conducted to test this. The results reject the hypothesis as far as these languages are concerned, thereby upholding the relevance of models developed to account for closest‐conjunct agreement within theories of agreement. [ABSTRACT FROM AUTHOR]

Hierarchical structure has been cherished as a grammatical universal. We use experimental methods to show where linear order is also a relevant syntactic relation. An identical methodology and design were used across six research sites on South Slavic languages. Experimental results show that in certain configurations, grammatical production can in fact favor linear order over hierarchical structure. However, these findings are limited to coordinate structures and distinct from the kind of production errors found with comparable configurations such as "attraction" errors. The results demonstrate that agreement morphology may be computed in a series of steps, one of which is partly independent from syntactic hierarchy., Competing Interests: The authors declare no conflict of interest., (Copyright © 2018 the Author(s). Published by PNAS.)