Dr. Vance is investigating the effect of regular aerobic exercise on brain-derived neurotrophic factor (BDNF) levels, a biological marker of neuroplasticity. To do this, he recruits a convenience sample of 15 male competitive runners, aged 20–25, from his local athletics club.
Explain one improvement that could be made to the sample gathered by Dr. Vance for his study.
82 exam-style questions on Edexcel A Level Psychology Research methods and skills, covering Research methods and skills. Each one has a worked solution and a mark scheme showing where the marks go.