Models of visuospatial and verbal memory across the adult life span.

TLDR

Memory architecture shows little differentiation across the life span. The study examined visuospatial and verbal memory processes across short‑term, working, and long‑term stages in 345 adults. The study found that processing‑intensive tasks decline steadily from the 20s while verbal knowledge rises, visuospatial and verbal working memory remain distinct yet interrelated, and there is little evidence of behavioral dedifferentiation with age, underscoring the value of integrating behavioral and brain data for understanding aging.

Abstract

The authors investigated the distinctiveness and interrelationships among visuospatial and verbal memory processes in short-term, working, and long-term memories in 345 adults. Beginning in the 20s, a continuous, regular decline occurs for processing-intensive tasks (e.g., speed of processing, working memory, and long-term memory), whereas verbal knowledge increases across the life span. There is little differentiation in the cognitive architecture of memory across the life span. Visuospatial and verbal working memory are distinct but highly interrelated systems with domain-specific short-term memory subsystems. In contrast to recent neuroimaging data, there is little evidence for dedifferentiation of function at the behavioral level in old compared with young adults. The authors conclude that efforts to connect behavioral and brain data yield a more complete understanding of the aging mind.