Measuring Reaction Time: Practical Guide

Overview

This is a required practical on measuring reaction time.
It involves two participants working together: Person 1 and Person 2.
The method includes using a ruler and measuring the time it takes for Person 1 to catch it after it is dropped by Person 2.
The practical aims to understand and describe how to measure reaction time accurately.

Setup:
- Person 1 sits on a stool with an upright posture.
- Dominant arm is placed across a table with the hand overhanging the edge.
- Dominant arm is typically the right arm for right-handed individuals.
Execution:
- Person 2 holds a ruler vertically with the zero-centimeter mark between Person 1's thumb and first finger.
- Person 2 instructs Person 1 to prepare to catch the ruler.
- Person 2 drops the ruler at a random time.
- Person 1 catches the ruler as quickly as possible.
- Measurement is recorded at the top of Person 1's thumb.
Repetition and Analysis:
- Person 1 rests briefly.
- Repeat the test several times and calculate the mean reaction time.
- Use a conversion table to interpret results.
- Swap roles and repeat process for Person 2.

Independent Variable: The person whose reaction time is being tested.
Dependent Variable: The reaction time recorded.
Control Variables:
- Distance between thumb and first finger.
- Measurement point on the ruler.
- Room conditions (lighting, noise).

Effect of Practice:
- Test if reaction time changes with repeated trials.
- Hypothesis: Reaction time decreases with practice.
Dominant vs Non-Dominant Hand:
- Test with both dominant and non-dominant hands.
- Expect shorter reaction time with the dominant hand.
Chemical Influence (e.g., Caffeine):
- Administer cola with caffeine and compare reaction time to baseline.
- Consider testing with caffeine-free cola for comparison.
- Ensure safety by checking for medical issues (allergies, heart conditions).