Age-related changes in involuntary and voluntary attention as reflected in components of the event-related potential (ERP).

Provides an overview of age-related changes in both involuntary and voluntary attention in adult Ss as manifested in scalp-recorded event related potential (ERP)s. A decline in orienting with old age was inferred from a substantial reduction with age in the magnitude of deviance-related ERP components. A review of focused attention studies suggested that old and young Ss do not differ substantially in the quality of attentional operations. In old Ss early selection processes, as reflected in their selection potentials, have a somewhat slower onset than in young Ss, especially in conditions in which selection is based upon complex discrimination of stimulus features. Furthermore, the global pattern emerging from visual and memory search studies is that search-related negativities in the ERPs are smaller and of longer duration in old than in young Ss over the central and anterior scalp sites. These effects could indicate that controlled search is less intense or takes more time per search operation in old than in young Ss. At more posterior scalp sites there was tendency towards an enhanced search-related negativity that could reflect a specific difficulty of old Ss in spatially locating targets in complex visual fields.