What are the main types of validity?
Validity tells you how accurately a method measures what it was designed to measure. There are four main types of validity:
- Construct validity: Does the test measure the construct it was designed to measure?
- Face validity: Does the test appear to be suitable for its objectives?
- Content validity: Does the test cover all relevant parts of the construct it aims to measure.
- Criterion validity: Do the results accurately measure the concrete outcome they are designed to measure?