Development and Validation of the Faceted Inventory of the Five-Factor Model (FI-FFM)

Area of Science:

• Psychology
• Personality Science

Background:

• The Five-Factor Model (FFM) is a widely accepted framework for personality structure.
• Developing comprehensive and hierarchically structured measures of the FFM is crucial for advancing personality research.

Purpose of the Study:

• To introduce and validate the Faceted Inventory of the Five-Factor Model (FI-FFM), a hierarchical personality measure.
• To assess the reliability and validity of the FI-FFM across multiple samples.

Main Methods:

• Scale development across five phases.
• Reliability testing (internal consistency, test-retest stability over 2 weeks).
• Validity testing (convergent, discriminant, informant ratings, incremental validity).

Main Results:

• FI-FFM scales exhibited high internal consistency and 2-week test-retest reliability (median r = .77).
• Strong convergent and discriminant validity was found against established measures (NEO, BFI, PID-5).
• Self- and informant-ratings showed moderate to strong agreement (median r = .42); neuroticism facets predicted internalizing psychopathology.

Conclusions:

• The FI-FFM is a reliable and valid hierarchical measure of personality.
• The FI-FFM demonstrates utility in predicting psychopathology, particularly internalizing symptoms.