GCSE Biology (AQA)

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Reaction Times Data

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Homeostasis and Response The Human Nervous System

Reaction Times Data

4:57 Reflexes and Reaction Times
Spec 4.5.2.1
Previous Investigating Reaction Times Next Brain Structure
  • Three students set up an experiment to compare their reaction times using a computer program.
  • The experiment involved sitting in front of a white computer screen and clicking the mouse when the screen turned red.
  • The experiment was repeated three more times for accuracy.
  • Results were recorded in a table showing reaction times in milliseconds for each trial.
  • Reaction time is defined as the time between the screen changing color and the student's response.
  • To simplify data comparison, a mean reaction time for each student was calculated and added to the table.
  • Anomalies in the data, likely caused by errors, were identified and excluded from mean calculations.
  • Mean reaction times calculated: Student A - 156 ms, Student B - 180 ms, Student C - 158 ms.
  • A bar chart was chosen to graphically represent the data because students are a categorical variable.
  • The Y-axis was labeled with reaction times in milliseconds, and the X-axis labeled with student identifiers (A, B, C).
  • A scale was established on the Y-axis with intervals of 10 milliseconds, up to a maximum of 200 milliseconds.
  • Bars representing each student's mean reaction time were plotted on the graph.
  • The graph was used to interpret the data, showing that Student B had the slowest reaction time, while the difference between Students A and C was insignificant.

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