Reaction Time Flashcards

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Note: We may include questions that have multiple correct answers. It's useful to remember specific examples to understand these concepts better.

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What is reaction time?

Reaction time is the time between a stimulus, such as a light or sound, and your response, such as moving your hand.

What units are usually used to measure reaction time, and what does a smaller value mean?

Reaction time is usually measured in seconds (s) or milliseconds (ms). A smaller value means a faster reaction.

What is the basic pathway through the nervous system in a voluntary reaction?

A receptor detects the stimulus, impulses travel along a sensory neurone to the brain, the brain decides what to do, then impulses travel along a motor neurone to an effector, which carries out the response.

How can you measure reaction time using the ruler drop test?

One person holds a ruler above another person’s open hand. Without warning, they let it go. The second person catches it as fast as possible, and the distance the ruler falls is recorded.

Why is it important to vary the time before dropping the ruler in a reaction time test?

Varying the time stops the catcher from guessing when the ruler will fall, so they are reacting, not just expecting it.

How can you make measurements in a reaction time experiment more reliable?

Repeat the test several times, keep conditions the same, and calculate a mean (average) reaction time.

Name two factors that can slow down reaction time.

Tiredness and drinking alcohol can slow reaction time. Distractions, such as using a phone, can also slow it.

Name two factors that can speed up reaction time.

Being alert and well rested can speed up reaction time. Practice and training can also make reactions faster.

Why is having a fast reaction time important in everyday life?

A fast reaction time helps you avoid danger, for example when crossing the road, cycling, or driving a car.

How does the distance nerve impulses travel affect reaction time?

The longer the distance the impulses must travel, the longer the reaction time, because it takes more time for the signals to reach the effector.