Alexithymia and the five-factor model of personality

Area of Science:

• Psychology
• Personality Science
• Clinical Psychology

Background:

• Alexithymia is a personality construct characterized by difficulty identifying and describing emotions.
• The Five-Factor Model (FFM) of personality includes Neuroticism, Extraversion, Openness, Agreeableness, and Conscientiousness.
• Previous research has explored the relationship between alexithymia and personality traits, but findings require further clarification.

Purpose of the Study:

• To investigate the relationship between alexithymia, measured by the Toronto Alexithymia Scale (TAS), and the FFM of personality, assessed by the NEO Five-Factor Inventory (FFI).
• To examine these relationships in both psychiatric outpatients and normal volunteers, controlling for depression.

Main Methods:

• Cross-sectional study design.
• Participants included 114 psychiatric outpatients and 71 normal volunteers.
• Statistical analyses were conducted to determine the predictive power of FFM domains on TAS scores, controlling for depression.

Main Results:

• When controlling for depression, neuroticism, introversion, and low openness significantly predicted alexithymia in both groups.
• These three personality dimensions explained 57.1% of the variance in alexithymia among patients and 38.1% among volunteers.
• Neuroticism was the primary predictor in the patient group, while introversion was most significant in the volunteer group.

Conclusions:

• Alexithymia is associated with specific personality traits within the FFM, particularly neuroticism and introversion.
• These findings suggest that alexithymia is a distinct trait not entirely encompassed by the FFM.
• Understanding the interplay between personality and alexithymia can inform clinical interventions for emotional processing difficulties.