Dr. Vance is a neuroscientist investigating whether salivary cortisol levels are linked to subjective anxiety in emergency responders. Dr. Vance sampled eight paramedics immediately after a high-stress shift. She measured each participant's salivary cortisol concentration (in μg/dL\mu\text{g/dL}μg/dL) and then asked them to complete a State-Trait Anxiety Inventory (STAI) questionnaire (scored out of 40).
Table 1
| Participant | Salivary cortisol concentration (μg/dL\mu\text{g/dL}μg/dL) | Anxiety score (STAI score out of 40) |
|---|---|---|
| A | 0.12 | 14 |
| B | 0.45 | 31 |
| C | 0.28 | 22 |
| D | 0.61 | 38 |
| E | 0.18 | 19 |
| F | 0.35 | 28 |
| G | 0.52 | 35 |
| H | 0.22 | 16 |
State a fully operationalised directional (one-tailed) alternative hypothesis for Dr. Vance's 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.
