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Details
Purpose
Assesses both normal and abnormal personality functioning
Authors
Timothy J. Trull, PhD, and Thomas A. Widiger, PhD
Administration Formats
Additional Details
Assess and Distinguish Between the Five Bipolar Personality Domains
The SIFFM is a semistructured interview assessing the five bipolar personality domains of the Five-Factor Model: Neuroticism (vs. Emotional Stability); Extraversion (vs. Introversion); Openness to Experience (vs. Closedness to Experience); Agreeableness (vs. Antagonism); and Conscientiousness (vs. Negligence).
Each of these broad domains can be differentiated into six underlying, nonoverlapping facets. The Five-Factor Model is comprehensive because it includes all of the adaptive and the maladaptive personality traits that have been emphasized within the English language.
The SIFFM approach is to first identify the individual's salient personality traits and then to assess whether these traits are maladaptive within the social, occupational, or personal context in which the individual functions. This approach avoids the problems inherent in arbitrary cutoffs and diagnostic thresholds.
The SIFFM is modeled closely after the NEO PI-R, an empirically validated self-report version of the Five-Factor Model. The SIFFM interview format allows the professional to ask probes and follow-up questions as needed. Therefore, the use of the two instruments conjointly could be particularly useful.
The SIFFM is a criterion-referenced instrument. It is straightforward and uses fairly common trait terms and behavioral descriptors. It contains 120 interview items and requires approximately one hour to administer. Answers are rated on a 3-point scale (0, 1, 2). Scores reflect both the degree to which the particular personality trait is present and the level of dysfunction that accompanies the trait.
The Professional Manual provides detailed information about the development, reliability, and validity of the SIFFM; administration, scoring, and interpretation; and a description of each domain, its relationship to various forms of psychopathology, the dysfunction associated with high and low levels of each domain, and a summary of SIFFM facet/DSM-IV personality disorder relationships.
