Developed by psychologist and University of Washington professor Allen L. Edwards, the Edwards Personal Preference Schedule (EPPS) is a forced choice, objective, non-projective personality inventory. The target audience in between the ages of 16-85 and takes about 45 minutes to complete.


Edwards derived the test content from the human needs system theory proposed by Henry Alexander Murray, which measures the rating of individuals in fifteen normal needs or motives. The EPPS was designed to illustrate relative importance to the individual of several significant needs and motives. It is useful in counseling situations when responses are reviewed with the examinee.

The 15 personality variable scales are Achievement, Deference, Order, Exhibition, Autonomy, Affiliation, Intraception, Succorance, Dominance, Abasement, Nurturance, Change, Endurance, Heterosexuality, and, Aggression.

The inventory consists of 225 pairs of statements in which items from each of the 15 scales are paired with items from the other 14 plus the other fifteen pairs of items for the optional consistency check. This leaves the total number of items at 210.

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Sources:
https://en.wikipedia.org/wiki/Edwards_Personal_Preference_Schedule