What are criterion, convergent, divergent, and diagnostic validity?

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What are criterion, convergent, divergent, and diagnostic validity?

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Step 1

Criterion-related validity:

A test is said to have criterion-related validity, if it helps to predict the status on an external criterion measure. That is, this measures how well a measure is predicted by another measure.

Step 2

Convergent validity:

This is one of a sub-type of construct validity. Convergent validity demonstrates a strong relationship between two measures. Suppose, the scores of two measurements are almost the same, then this demonstrate the same construct is measured.

Step 3

Divergent validity:

Divergent validity is another sub-type of construct validity. It demonstrates that there is no relationship (or little) between two measures. That is, one construct is different f...

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