Reaction time
What Reaction time means in Combined Science GCSE, as defined for AQA.
Definitions of Reaction time
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Reference: AQA
The interval between seeing a hazard and braking, which is not fixed and depends on the driver's state and surroundings.
Typically between 0.2 s and 0.9 s in humans, and varies with factors like tiredness, distraction, caffeine and practice.
The interval between detecting a stimulus and starting a response, not the total stopping time of a vehicle.
The interval between detecting a stimulus and making a response.
Topics that use Reaction time
- Reaction time (AQA GCSE)
Related terms
Using Reaction time in the exam
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