Dr. Talia is investigating the impact of chronic sleep deprivation on salivary cortisol levels, a biological marker of the physiological stress response. To do this, she recruits a convenience sample of 12 female undergraduate nursing students, aged 19–21, from her university department.
Explain one improvement that could be made to the sample gathered by Dr. Talia for her study.
Practise Edexcel A Level Psychology Research methods and skills with exam-style questions for A Level Psychology. 657 questions covering Research methods and skills, matched to the Edexcel A Level Psychology (9PS0) 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.
