# | Method | Purpose | Best Tool | Notes |
1 | Reliability Analysis | To test for internal consistency of the research instrument | Cronbach’s Alpha | The Cronbach’s Alpha of more than 0.8 is very reliable. |
2 | Validity Analysis | To ensure that the instrument measures exactly what it is meant to measure: | Content Validity | A general consensus is reached among researchers and subjects |
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| Criterion-related Validity | This is also called predictive validity or external validity. It is premised on the degree to which the measuring instrument is related to an independent measure of the relevant criterion. |
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| Construct Validity | The extent to which the items in a scale measure the same construct. |