Validity is defined as the degree of agreement between the claimed measurement and the real world.
There are four categories of validity test, namely:
- Content validity – Seeks to answer the question of whether the current test covers all relevant items needed to answer the research question.
- Criterion validity – Degree of correlation between the current test to the predetermined standard. The predetermined standard scores are those that had been tested by prior studies and had been held to be valid.
- Construct validity – Degree to which the test actually measures what the theory claims.
- Face validity – Use the respondents to answer the question: Does the survey or test measure what it intended to measure? This is the subjective view of the respondents to the survey (not experts). use this as a test-run before distributed the real survey.
