Which of the following is considered a cognitive feature of aging?

Slower reaction times are indeed considered a cognitive feature of aging. As individuals age, various neurological and physiological changes occur in the brain, leading to a decrease in processing speed. This can manifest as slower reaction times in both physical and mental tasks. For example, older adults may take longer to respond to stimuli or to organize thoughts and actions, which is a natural part of the aging process.

In contrast, other options may touch on aspects related to aging but do not specifically describe a cognitive feature. The inability to learn new skills may not necessarily be a direct result of aging, as many older adults can still acquire new knowledge and abilities—although they might approach learning differently. Loss of independence is more about social and physical factors rather than cognitive capabilities. Increased memory confusion can occur in various contexts, but it is not universally experienced as a feature of aging; many older adults maintain good memory function. Therefore, slower reaction times are more representative of the cognitive changes associated with aging.