ABSTRACT
Cognitive changes have been shown to be strongly age-related, but the boundary between normal ageing and cognitive decline is less clear. Several approaches to the examination of ageing and cognition have emerged over the last few decades, all of which have examples in the UK-based literature. This chapter draws on empirical data on cognitive performance and change with age from three population-based studies of the elderly in England and Wales: two based in Cambridgeshire—the rural East Cambridgeshire study and the Cambridge City over-75s Cohort (CC75C) study; and one national—the Medical Research Council Cognitive Function and Ageing Study (MRC CFAS).
