Required Practical: Measuring Reaction Time (RPA7)

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🧪 Required Practical: Measuring Reaction Time (RPA7)

In this practical, you measure reaction time using the ruler-drop method:

  1. One person holds a ruler vertically at the 0 cm mark between another person's open thumb and forefinger.
  2. The ruler is dropped without warning — the second person catches it as quickly as possible.
  3. Read the distance the ruler fell (in cm) and use a conversion table to find the reaction time.
  4. Repeat at least 5 times and calculate the mean to improve reliability.

Variables: Independent = factor being tested (e.g. caffeine, practice). Dependent = distance ruler falls. Control = same ruler, same hand, same starting position.

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