Validity
The manual reports studies comparing the EPPS with the Guilford Martin Personality Inventory and the Taylor Manifest Anxiety Scale. Other researchers have correlated the California Psychological Inventory, the Adjective Check List, the Thematic Apperception Test, the Strong Vocational Interest Blank, and the MMPI with the EPPS. In these studies there are often statistically significant correlations among the scales of these tests and the EPPS, but the relationships are usually low-to-moderate and sometimes are difficult for the researcher to explain. Since the MMPI is still actively used today on a worldwide basis as a major brand test this comparison might be the most interesting to study.
Read more about this topic: Edwards Personal Preference Schedule
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