Title: From Assistants to Companions: Towards the Usefulness of Improving Theory of Mind for Human-AI Symbiosis
Primary area: alignment, fairness, safety, privacy, and societal considerations
Keywords: Theory of Mind, Large Language Model, Human-AI Interaction

Abstract: Theory of Mind (ToM) is crucial for successful human-AI (HAI) interactions. It is a key capability for AI to attribute humans' mental states based on dynamic interactions from a first-person perspective and then improve responses to humans accordingly. However, the existing benchmarks for Large Language Models (LLMs) focus on testing their ToM capability with story-reading from a third-person perspective, leading to a critical gap between benchmark performance and practical competence in HAI collaborative and supportive tasks. To bridge this gap, we introduce a novel evaluation framework within HAI contexts, shifting from static test-taking to dynamic, first-person engagement. Our framework assesses LLM performance across two fundamental types of interaction scenarios derived from cognitive science: goal-oriented tasks (e.g., coding, math) and experience-oriented tasks (e.g., counseling). With the framework, we systematically evaluate LLMs and related techniques to improve their ToM across four synthesized benchmarks and a crowdsourcing user study with 100 participants. Our findings reveal that improvements on static benchmarks do not always translate to better performance in dynamic HAI interactions. This paper offers critical insights into ToM evaluation, highlighting the necessity of interaction-based assessments and providing a roadmap for developing next-generation, socially aware LLMs for HAI symbiosis.