This longitudinal study investigated discourse abilities in 16 normal
adults in their 80s and 90s at two separate testing times. The discour
se tasks evaluated macro-level processing of narratives as manifested
on retells, summaries, gists, and morals, and in explanations of prove
rbs. The group results showed preservation with increased age on those
discourse tasks that required global levels of processing. No signifi
cant decreases in performance were found in applying strategies of red
uction, generalization, and interpretation, factors associated with pr
eserved discourse function in normal advanced ageing are discussed. Th
e findings have implications for differential diagnosis of dementia an
d aphasia.