What does different personality test and or behavioral test measure ?

Like all self-estimated and or self-assessed tests, they require that the person wants and can report truthfully about oneself.

Therefore, different self-estimated test measure this in different ways and some do not even measure it . Some test that I have asked do not answer if the measure something like consistency or reliability at all.

Some other test answers, and - refers sometimes this to a coefficient called Cronbach Alpha, Cronbach’s alpha measures whether questions belonging to the same scale produce similar scores.

Does anyone know more about these tests and its measurement?

Any research ?

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