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Question 113

Dr. Vance conducted an experiment to investigate the effects of aromatherapy on performance anxiety.

Participants were assigned to one of two separate groups:

  • Group A: Participants inhaled lavender essential oil for five minutes prior to a cognitive task.
  • Group B: Participants inhaled plain water vapor for five minutes prior to the same cognitive task.

Dr. Vance recorded each participant's self-reported stress score using a 10-point scale. She then carried out a Mann-Whitney U test on her data.

State two reasons why Dr. Vance chose to use a Mann-Whitney U test to analyze her data.

[2]
Markscheme

Methods Questions

  1. A Level
  2. /Psychology
  3. /Methods

638 exam-style questions on Edexcel A Level Psychology Methods. Each one has a worked solution and a mark scheme showing where the marks go.

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