Apply safe and valid practical design to reaction-time investigations, including control variables, repeats and calculation of mean values.

In the subtopic Structure and function, this learning objective focuses on apply safe and valid practical design to reaction-time investigations, including control variables, repeats and calculation of mean values. Within The human nervous system, students should explain this idea in the exact curriculum context rather than as an isolated fact. Approved keywords for this objective include apply, design, practical, safe, and valid. control variables means factors that are kept constant during an experiment to ensure that the results are valid and reliable. Avoid students often forget to identify and control variables that could affect the outcome of their reaction-time investigations; instead ensure to list all potential variables and explain how you will keep them constant throughout the experiment. For exam answers, when designing your reaction-time investigation, ensure you clearly define your control variables, plan for repeats, and outline how you will calculate mean values.