Which of the following research studies collects ordinal level data?
An educational psychologist records the finishing placements (1st, 2nd, 3rd, etc.) of students in a spelling bee.
A researcher measures the concentration of cortisol (in micrograms per decilitre, μg/dL\mu\text{g/dL}μg/dL) in saliva samples collected from participants after a stressful task.
A cognitive psychologist records the ambient temperature of the testing room in degrees Celsius (∘C^\circ\text{C}∘C) to see if it affects attention span.
A clinical psychologist categorizes psychiatric patients according to their primary diagnosed condition (e.g., depressive disorder, anxiety disorder, obsessive-compulsive disorder).
644 exam-style questions on OCR A Level Psychology Research methods and techniques. Each one has a worked solution and a mark scheme showing where the marks go.