Grammaticalization and the linguistic individual: new avenues in lifespan research.

This paper reviews theoretical and methodological advances and issues in lifespan research and discusses how the issues at stake are addressed in an ongoing research project. Summarizing the state of the art, we conclude that next to nothing is known about lifespan changes affecting syntactic or grammaticalizing constructions that goes beyond exploratory or anecdotal evidence. The Mind-Bending Grammars project, which examines the adaptive powers of adult cognition and constraints on these powers, aspires to make headway in this area. In this paper, we introduce some of the major goals of the project and present a new large-scale longitudinal corpus of 50 adults that was established to study grammatical change across the lifespan. Particular attention is paid to the constraints on the adoption of novel grammatical patterns in the aging mind. Taking be going to as a case study, we present evidence that (highly educated) healthy monolingual speakers continue to participate in grammatical innovations across the lifespan. [ABSTRACT FROM AUTHOR]