Figure 1
An environmental health study investigated the relationship between the density of urban green canopies (CCC, in m2\text{m}^2m2 per hectare) and the concentration of salivary cortisol (SSS, in μg/dL\mu\text{g/dL}μg/dL), a common biological marker of stress, in a sample of adult residents living in different city districts.
Refer to Figure 1. Explain why it would not be appropriate for the researchers to conclude from this study that an increase in urban green canopy density causes a reduction in salivary cortisol levels.
Correlations Questions
Practise AQA A Level Psychology Correlations with exam-style questions for A Level Psychology. 30 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.