Researchers wanted to investigate the efficacy of different alertness strategies on the spatial working memory of night-shift staff.
In demanding clinical environments, staff often rely on different methods to combat fatigue. The researchers wanted to compare the effects of a planned 20-minute micro-nap against the consumption of a standard 250 ml caffeinated energy drink on spatial working memory.
A sample of 60 registered night-shift nurses was recruited from a large metropolitan hospital.
The participants were allocated to one of two conditions:
Following their designated 20-minute intervention, all participants completed a standardised Corsi block-tapping task to assess their spatial working memory capacity.
Describe how the researchers could have used a stratified sampling technique to recruit the 60 registered nurses.
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.