The impact of age in rule-based and information-integration category learning tasks.

= 30; aged 60-79 years) adults on a one-dimensional (1RB), a two-dimensional (2RB), and an II category learning task. Bayesian survival analyses revealed that older adults reached criterion at approximately 57% of the rate of younger adults in the 1RB task, 78% in the 2RB task, and 75% in the II task. Thus, age-related slowing was greatest in the simplest RB condition and weaker in the more complex 2RB and II tasks. The 1RB effect was also estimated with greater clarity, whereas the 2RB and II effects were directionally similar but more uncertain. These effects may reflect impairments in either or both learning systems or difficulty shifting between them. (PsycInfo Database Record (c) 2026 APA, all rights reserved).