Big Five aspects of personality interact to predict depression

Area of Science:

• Psychology
• Psychopathology
• Personality Science

Background:

• Three major personality traits (Neuroticism, Extraversion, Conscientiousness) interact to predict depressive symptoms in healthy individuals.
• This study investigates if this interaction is driven by lower-order traits: withdrawal, industriousness, and enthusiasm.

Purpose of the Study:

• To test the hypothesis that withdrawal, industriousness, and enthusiasm interact to predict depressive symptoms.
• To replicate this interaction in a clinical population with major depressive disorder for the first time.

Main Methods:

• Sample 1: 376 healthy adults assessed with Big Five Aspect Scales and Personality Inventory for DSM-5.
• Sample 2: 354 patients with major depressive disorder assessed with NEO-PI-R and Beck Depression Inventory-II.

Main Results:

• Withdrawal, industriousness, and enthusiasm interacted to predict depressive tendencies in both healthy and clinical samples.
• Findings supported a "best two out of three" principle: low scores on two traits protected against a high score on the third.
• Evidence also supported a "worst two out of three" principle: high scores on two traits predicted depressive severity comparable to high scores on all three.

Conclusions:

• The interactive effects of personality traits are crucial for understanding psychopathology.
• These lower-order traits provide a nuanced understanding of depression risk and severity.