Which type of intelligence tends to decrease during late adulthood and is associated with reasoning speed and abstract thinking?

Fluid intelligence refers to the capacity to think logically and solve problems in novel situations, independent of acquired knowledge. It encompasses abilities such as reasoning speed, abstract thinking, and the capability to identify patterns. Research indicates that fluid intelligence typically declines with age, particularly in late adulthood. This decrease can manifest as slower reaction times and challenges in processing new information or navigating complex problem-solving tasks.

In contrast, crystallized intelligence, which involves knowledge acquired from experience and education, often remains stable or may even improve with age. Social intelligence pertains to interpersonal skills and the ability to navigate social environments, which can also change differently across the lifespan. Cognitive intelligence is a more general term that can encompass various types of intelligence, so it doesn’t specifically address the decline mentioned in the question. Thus, fluid intelligence is the most accurate choice when identifying a type of intelligence that decreases with age and is linked to reasoning speed and abstract thinking.