Some general principles of assessment
- Measurement error
- Typically, a single observation is hard to interpret. It needs context
- E.g. clinical presentation, complaints, other measures, repeated observations
- Some cut-offs may be of clinical relevance (e.g. BMI)

- Typically, a single observation is hard to interpret. It needs context
- Calibration!
- Standardisation
- Normal values
- Percent predicted or percentile à lower limit of normal
- For the test as you conduct it
