Accounting for Individual Differences in Decision-Making Competence: Personality and Gender Differences.

Area of Science:

• Psychology
• Decision Science
• Personality Psychology

Background:

• Individual differences in decision-making competence (DMC) correlate with positive psychosocial and health behaviors.
• Functional personality theories link broad trait dimensions to self-regulatory systems, explaining trait-outcome associations.
• The relationship between dispositional personality traits and rational decision-making tendencies requires further investigation.

Purpose of the Study:

• To examine the associations between the HEXACO personality dimensions and decision-making competence (DMC).
• To investigate potential gender differences in DMC and its measurement invariance.
• To explore gender-specific links between personality traits and DMC.

Main Methods:

• Utilized a large online community sample (N = 804).
• Assessed HEXACO personality dimensions and a subset of DMC indicators (Applying Decision Rules, Resistance to Framing, Recognizing Social Norms, Consistency in Risk Perception).
• Conducted analyses to test associations between personality traits and DMC, including gender-specific comparisons and measurement invariance testing.

Main Results:

• Partial measurement invariance was observed for DMC across genders; only the Applying Decision Rules scale showed differential functioning.
• Higher scores in Conscientiousness, Honesty/Humility, and Openness were associated with higher DMC.
• Gender-specific associations were found: low Extraversion predicted higher DMC in men, while high Emotionality predicted higher DMC in women.

Conclusions:

• Dispositional traits related to self-regulation (Conscientiousness, Honesty/Humility, Openness) are linked to a greater tendency for rational decision-making.
• Gender moderates the relationship between certain personality traits (Extraversion, Emotionality) and DMC.
• Understanding personality's role in DMC offers insights into rational thought and behavior.