Deterministic AI Agent Personality Expression through Standard Psychological Diagnostics

• URL: http://arxiv.org/abs/2503.17085v1
• Date: Fri, 21 Mar 2025 12:12:05 GMT
• Title: Deterministic AI Agent Personality Expression through Standard Psychological Diagnostics
• Authors: J. M. Diederik Kruijssen, Nicholas Emmons,
• Abstract summary: We show that AI models can express deterministic and consistent personalities when instructed using established psychological frameworks.<n>More advanced models like GPT-4o and o1 demonstrate the highest accuracy in expressing specified personalities.<n>These findings establish a foundation for creating AI agents with diverse and consistent personalities.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-sa/4.0/
• Abstract: Artificial intelligence (AI) systems powered by large language models have become increasingly prevalent in modern society, enabling a wide range of applications through natural language interaction. As AI agents proliferate in our daily lives, their generic and uniform expressiveness presents a significant limitation to their appeal and adoption. Personality expression represents a key prerequisite for creating more human-like and distinctive AI systems. We show that AI models can express deterministic and consistent personalities when instructed using established psychological frameworks, with varying degrees of accuracy depending on model capabilities. We find that more advanced models like GPT-4o and o1 demonstrate the highest accuracy in expressing specified personalities across both Big Five and Myers-Briggs assessments, and further analysis suggests that personality expression emerges from a combination of intelligence and reasoning capabilities. Our results reveal that personality expression operates through holistic reasoning rather than question-by-question optimization, with response-scale metrics showing higher variance than test-scale metrics. Furthermore, we find that model fine-tuning affects communication style independently of personality expression accuracy. These findings establish a foundation for creating AI agents with diverse and consistent personalities, which could significantly enhance human-AI interaction across applications from education to healthcare, while additionally enabling a broader range of more unique AI agents. The ability to quantitatively assess and implement personality expression in AI systems opens new avenues for research into more relatable, trustworthy, and ethically designed AI.

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