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Scientific processes

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Question 217

A sports scientist wants to investigate whether consuming a high-caffeine energy drink improves reaction times in amateur athletes.

She recruits 40 participants and splits them into two distinct groups:

  • Group 1: Consumes 250 ml of a caffeinated energy drink 30 minutes before completing a computerised reaction time test.
  • Group 2: Consumes 250 ml of a lookalike, caffeine-free placebo drink 30 minutes before completing the identical computerised reaction time test.

Identify the experimental design used in this investigation and explain one strength of using this experimental design in this context.

[3]

Scientific processes Questions

  1. A Level
  2. /Psychology
  3. /Scientific processes

Practise AQA A Level Psychology Scientific processes with exam-style questions for A Level Psychology. 689 questions, matched to the AQA A Level Psychology (7182) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

Question bank