Learning objective
Apply safe and valid practical design to reaction-time investigations, including control variables, repeats and calculation of mean values.
Read the explanation, check the common trap, then practise with flashcards and questions.
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Topic
The human nervous system
Subtopic
Structure and function
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Quick explanation
Apply safe and valid practical design to reaction-time investigations, including control variables, repeats and calculation of mean values
- This point belongs to The human nervous system, especially Structure and function.
- You need to be able to apply safe and valid practical design to reaction-time investigations, including control variables, repeats and calculation of mean values.
- The key ideas to know are practical, valid, and design.
- Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.
Key concepts
Why it matters
This objective helps connect Structure and function to exam-style questions, flashcards, and revision notes for The human nervous system.
Quick student answer
What are the variables in the safe and valid practical design to reaction-time investigations, including control variables, repeats and calculation of mean values?
Direct answer
In Biology, this page helps you handle practical questions about safe and valid practical design to reaction-time investigations, including control variables, repeats and calculation of mean values in The human nervous system. Focus on the independent, dependent and control variables, the method, and how the evidence supports a conclusion. Key terms to check are control variables and mean values.
Key terms
- control variables: Factors that are kept constant during an experiment to ensure that the results are valid and reliable.
- mean values: The average of a set of numbers, calculated by adding them together and dividing by the number of values, used to summarize data in experiments.
Common trap
Ignoring Control Variables: Ensure to list all potential variables and explain how you will keep them constant throughout the experiment.
Related questions
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Revision notestopic notes
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Open revision notesRelated learning objectives
- Describe the nervous system as a system that enables humans to react to their surroundings and coordinate behaviour.
Structure and function
- Describe the pathway in which receptor cells detect stimuli, sensory neurones carry impulses to the CNS, the CNS coordinates a response and motor neurones carry impulses to effectors.
Structure and function
- Explain that the brain and spinal cord form the central nervous system.
Structure and function
- Describe muscles and glands as effectors that bring about responses, with muscles contracting and glands secreting hormones.
Structure and function
- Explain why reflex actions are automatic and rapid protective responses that do not require conscious thought.
Structure and function