Final answer:
The relationship between age and cognitive ability for superagers is that cognitive ability remains stable throughout the lifespan for superagers.
Step-by-step explanation:
In the lecture, it was mentioned that our cognitive abilities remain steady throughout early and middle adulthood. While fluid intelligence, which includes information processing abilities and reasoning, tends to decline in late adulthood, our crystallized intelligence, which consists of skills and knowledge gained through experience, tends to hold steady and may even improve with age. Therefore, the relationship between age and cognitive ability for superagers is that cognitive ability remains stable throughout the lifespan for superagers. (b) Cognitive ability remains stable throughout the lifespan for superagers.