GCSE Biology (AQA)

331 videos | 14 hours

Investigating Reaction Times

Please subscribe to watch this video.

This, and all other videos, are included in our premium subscriptions.

Premium accounts get access to all videos.

Homeostasis and Response The Human Nervous System

Investigating Reaction Times

2:38 Reflexes and Reaction Times
Spec 4.5.2.1
Previous Reflexes Next Reaction Times Data
  • Reaction time is the duration between the onset of a stimulus and the response to it.
  • A stimulus is any change in the environment that requires a response.
  • Longer reaction times indicate slower responses, while shorter reaction times indicate faster responses.
  • Reaction times can be investigated using various methods such as computer tests or the ruler drop test.
  • The ruler drop test measures reaction time based on the distance a ruler falls before being caught.
  • Factors such as time of day, caffeine intake, and alcohol consumption can affect reaction times.
  • These factors are studied to understand their impact on the nervous system, which controls our reactions.
  • In experiments, the independent variable is the factor that is intentionally changed to observe its effect on reaction times.
  • Examples of independent variables include time of day, amount of caffeine, and amount of alcohol.

Please subscribe to access these revision notes.

This, and all other video notes, are included in our premium subscriptions.

Premium accounts get access to all videos and revision notes.