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Scientific processes

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Question 218

Study Description: Caffeine and Reaction Times

An occupational psychologist wants to investigate whether drinking a high-caffeine energy drink affects response speeds in warehouse operators.

The psychologist uses a repeated measures design with 36 warehouse operators.

  • Condition A: Participants consume a 250 ml high-caffeine energy drink 30 minutes before completing a computer-simulated sorting task.
  • Condition B: The same participants consume a 250 ml caffeine-free placebo drink 30 minutes before completing an equivalent computer-simulated sorting task.

To control for order effects, the psychologist decides to counterbalance the participants across the two conditions.

Describe how the psychologist could counterbalance the participants across these experimental conditions.

[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