Edwards Personal Preference Schedule
Introduction
EDWARDS PERSONAL PREFERENCE SCHEDULE
A personality inventory comprising 225 pairs of statements relating to likes and preferences the respondent being required to choose the preferred alternative in each case. The scale is ipsative, and it yields scores on 15 needs based on the theory of personality introduced by the US psychologist Henry Alexander Murray (1893–1988) in his book Explorations in Personality (1938), namely needs for achievement, deference, order, exhibition, autonomy, affiliation, intraception, succourance, dominance, abasement, nurturance, change, endurance, homosexuality, and aggression. On an ipsative measure, the overall score-average across all subtests- is always the same for every examinee. On an ipsative scale, high scores are relative, not absolute. In other words the strength of each need is expressed not absolutely but relative to the strength of examinee’s other needs.
According to Edward the EPPS is not actually a test in strictest sense of the word because there are no right and wrong answers. EPPS is that pair of statements in each item is matched for social desirability. Because each statement in an item pair is of equal social desirability, the content of each statement will exert more “pull” in determining the examinees choice.
Test Consistency
As a further check on the validity of EPPS results, Edwards included a consistency scale with 15 pairs of statement repeated in identical form. In other words, the 210 pairs of statements, only 195 are unique. The 15 that occur twice are presented more or less randomly throughout the test. With this format the number of times a subject make the identical choice can be converted to a percentile based on a normative data. Inventories consisted of 225 pairs of statements in which items from each of the 15 scales paired with other items from the 14 plus pairs of twelve other items to check consistency optional. This leaves the number of items (14x15) at 210. Edwards has used 15
EDWARDS PERSONAL PREFERENCE SCHEDULE
A personality inventory comprising 225 pairs of statements relating to likes and preferences the respondent being required to choose the preferred alternative in each case. The scale is ipsative, and it yields scores on 15 needs based on the theory of personality introduced by the US psychologist Henry Alexander Murray (1893–1988) in his book Explorations in Personality (1938), namely needs for achievement, deference, order, exhibition, autonomy, affiliation, intraception, succourance, dominance, abasement, nurturance, change, endurance, homosexuality, and aggression. On an ipsative measure, the overall score-average across all subtests- is always the same for every examinee. On an ipsative scale, high scores are relative, not absolute. In other words the strength of each need is expressed not absolutely but relative to the strength of examinee’s other needs.
According to Edward the EPPS is not actually a test in strictest sense of the word because there are no right and wrong answers. EPPS is that pair of statements in each item is matched for social desirability. Because each statement in an item pair is of equal social desirability, the content of each statement will exert more “pull” in determining the examinees choice.
Test Consistency
As a further check on the validity of EPPS results, Edwards included a consistency scale with 15 pairs of statement repeated in identical form. In other words, the 210 pairs of statements, only 195 are unique. The 15 that occur twice are presented more or less randomly throughout the test. With this format the number of times a subject make the identical choice can be converted to a percentile based on a normative data. Inventories consisted of 225 pairs of statements in which items from each of the 15 scales paired with other items from the 14 plus pairs of twelve other items to check consistency optional. This leaves the number of items (14x15) at 210. Edwards has used 15
References: Robert, J. G. (2004). Structured Personality Assessment. Psychological Testing: History, Principles, and Applications, (4), 545-546 and 16 PF in a psychiatric population. Journal of clinical Psychology, 27 (2), 248-251. DOI: 10.1002/1097-4679(197104)27:2<248 Bernard, B