Final answer:
The Seattle Longitudinal Study suggests that older workers maintained their intellectual prowess in interactions with other people, with things, and with data, supported by the notion that crystallized intelligence holds steady or improves with age.
Step-by-step explanation:
The Seattle Longitudinal Study examined the cognitive complexity of occupations and how cognitive abilities are maintained in older adults. The study's findings suggest that older workers maintained their intellectual prowess in interactions with other people, with things, and with data. This indicates that the cognitive abilities involving crystallized intelligence, such as knowledge accrued from life experiences, remain steady or may even improve with age. Cognitive engagement through mentally and physically stimulating activities is associated with less cognitive decline and may help delay the onset of cognitive impairments in later life.