Cognitive function was assessed using a battery of 19 tests for various types of memory (episodic, semantic and working memory), as well as perceptual speed and visuospatial ability.

认知功能是由19个对记忆力(不连贯的，语义的，工作的记忆)，感知速度和视觉空间能力的各种检测来评价的。

youdao

They didn't even walk faster; walking speed wasn't correlated with cognitive ability.

他们甚至走得并不更快；步行速度与认知能力没有关系。

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Getting less or more than the six to eight hours recommended sleep increases the speed of cognitive decline and affects abilities such as reasoning and vocabulary.

人的合理睡眠时间是在6至8小时之间，低于或者超出这个范围将导致人的认知能力下降，影响到诸如推理和词汇等能力。

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The findings suggest that even a half-hour walk at a quick speed every day could lower the risk of cognitive impairment.

VOA: special.2011.07.27

From the strokes, he has complications with mobility, and a lower speed of cognitive processing, but no difficulty speaking.

CNN: Healing touch of family, friends aids recovery

For example, one day we might be able to design apps that allow people to probe their own cognitive abilities (processing speed, memory, decision-making, etc.) at any time during the day and track these abilities over the years, transmitting the results from their smartphones to a health care provider if desired.

CNN: How mobile tech can influence our brain

And although imaging studies show that middle-aged people may use different brain regions to do the same old tasks, cognitive tests show that apart from brute speed, the brain's abilities are not diminished in middle age.

BBC: Viewpoint: Just what is middle age?