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Personality Assessment in Groups of Different Verbal Intelligence Levels
Martina Lozić1, Denis Bratko1, Tena Vukasović Hlupić1
1Department of Psychology, Faculty of Humanities and Social Sciences, University of Zagreb, Zagreb, Croatia.
Scandinavian Journal of Psychology
|February 23, 2025
Summary
This study investigated if higher intelligence leads to more varied personalities. Results partially supported this, finding greater personality variability in highly intelligent individuals using one personality inventory, but not another.
Area of Science:
- Psychology
- Cognitive Science
- Individual Differences
Background:
- The relationship between intelligence and personality variability is debated.
- The differentiation by intelligence hypothesis suggests more intelligent individuals exhibit greater personality variation.
Purpose of the Study:
- To test the differentiation by intelligence hypothesis.
- To compare personality variances, reliability, and correlations across different intelligence groups.
Main Methods:
- Utilized two independent datasets (N=1491 total).
- Assessed verbal intelligence using a vocabulary test.
- Measured personality via self-report inventories (NEO-FFI and HEXACO-100).
- Compared low-ability (G1) and high-ability (G3) groups.
Main Results:
- Partial support for the hypothesis was found with the NEO-FFI, showing higher variances and reliability in the high-intelligence group.
- No similar trend was observed when personality was assessed using the HEXACO inventory.
- Inter-scale correlations did not differ significantly between groups.
Conclusions:
- The study provides limited evidence for the personality differentiation by intelligence hypothesis.
- Findings suggest the relationship may depend on the specific personality measures used.
Keywords:
HEXACONEO‐FFIdifferentiation of personality by intelligence hypothesisintelligencepersonality assessmentMore Related Videos
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