Purpose: Designed as an objective personality test.
Population: Ages 16 and above.
Score: Sten scores.
Time: 30-60 minutes.
Author: Raymond B. Cattell
Publisher: Institute for Personality and Ability Testing, Inc.
Description: The Sixteen Personality Factor Questionnaire (16PF) is an objective test of 16 multidimensional personality attributes arranged in omnibus form. In general, it provides normed references to each of these attributes (the primary scales). Conceptualized and initially developed by Raymond B. Cattell in 1949 as a broad, multipurpose measure of the "source traits" of individual personality, the 16PF is appropriate for a wide range of multifaceted populations. It provides a global representation of an individualís coping style, the personís reactive stance to an ever-fluid and transactional environment and that individualís ability to perceive accurately certain specific environmental requisites for personal behavior.
Scoring: A subjectís raw score for each of the 16 primary factors is obtained through a weighted procedure where particular responses count as "1" or "2" summatively toward the final raw score. These weighted or unweighted sums are then compared to the desired normative score tables in the tabular supplement where a particular sten score is identified based on the magnitudinal range of the response and the individual normative demographics of the respondent. This sten score is entered on the profile form and subsequently depicted graphically for ease of interpretation.
Reliability: Reliability coefficients calculated by test-retest with short intervals (single or multiple day) demonstrate relatively acceptable coefficients, with only sporadic instances of a scale falling below a .70 magnitude. For stability coefficients, test-retest administrations conducted over long intervals (several weeks), magnitudes are expectedly reduced. Intercorrelations between primary factor scales generated from different test forms are seldom greater than .50 when Forms A and B are compared. Fewer coefficients of .50 or more magnitude exist for Forms C and D.
Validity: Forms A and B are reported to have the greatest total direct validity where each form has seven scales with validity coefficients of at least .70 magnitude. Indirect construct validities for Forms A, B, C, and D are also reported in the form of multiple correlation coefficients, representing the degree of relationship between each primary scale magnitude and the total remaining primary scale magnitudes in the 16PF. As might be anticipated, correlational coefficients fall below a .80 magnitude in only two instances: .63 for Shrewdness and .74 for Imagination.
Norms: The norms were constructed for high-school juniors and seniors, college students, and a general nation-wide population of age and income levels commensurate with the then current U.S. Bureau of Census figures.
Suggested Uses: The 16PF is recommended for use in personality assessment as part of a battery in clinical and research settings.