Special items are included in the Minnesota Multiphasic Personality Inventory in order to detect whether someone is lying, but people may still deliberately fake their responses or answer in what they think is a socially desirable way.

Question

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While special items are included in the MMPI in order to detect lying, people may still intentionally fake their responses or answer in a way that they believe is socially desirable. Therefore, there is no foolproof way to determine whether someone is being completely truthful in their responses on the MMPI.

Special Items Are Included in the Minnesota Multiphasic Personality Inventory