What type of test is used to measure a person's ability to divide their attention?

The correct answer is a field sobriety test, which is designed to assess a person's ability to perform tasks that require divided attention. A field sobriety test typically includes a series of physical and cognitive tasks that a driver must complete while also focusing on external instructions and the environment. This is particularly relevant in the context of impaired driving, as individuals must demonstrate their ability to maintain their attention and perform tasks safely while performing both mental and physical activities simultaneously.

Cognitive ability tests primarily evaluate a broader range of mental capabilities, such as reasoning, problem-solving, and comprehension, rather than specifically measuring divided attention. Reaction time tests focus more on how quickly a person can respond to stimuli, which does not necessarily involve the simultaneous management of multiple tasks. Memory tests assess an individual’s short-term and long-term memory capabilities rather than their attentional capacity while performing different tasks.