{"slug": "a-large-scale-evaluation-of-role-enhanced-zero-shot-chain-of-thought-prompting", "title": "A Large-Scale Evaluation of Role-Enhanced Zero-Shot Chain-of-Thought Prompting", "summary": "A paper posted as arXiv:2610.29073v1 introduces Role-Enhanced Zero-Shot Chain-of-Thought (RE-ZS-CoT), a prompting framework that assigns domain-specific expert roles to large language models without task-specific examples, and reports gains of up to 44 percentage points over zero-shot and zero-shot-CoT baselines across 20 LLMs and seven benchmarks. The study tested static role selection, with eight predefined expert roles across arithmetic, commonsense and reading comprehension benchmarks, and dynamic role selection, in which each model picks the single most suitable role per benchmark. Ablation studies found unconventional roles degrade performance, and the framework scaled across model sizes from 2b to 14b parameters, with Granite3.3-8b showing strong arithmetic reasoning.", "body_md": "arXiv:2610.29073v1 Announce Type: new \nAbstract: This paper proposes Role-Enhanced Zero-Shot Chain-of-Thought (RE-ZS-CoT), a prompting framework that systematically integrates domain-specific expert roles to enhance reasoning in large language models (LLMs) without task-specific examples. We assess two versions of our approach. In the first version, static role selection, we evaluate eight predefined expert roles across arithmetic, commonsense, and reading comprehension benchmarks to determine their impact on reasoning performance. In the second version, dynamic role selection, each model autonomously selects the single most suitable role for each benchmark, enabling adaptive task-role alignment without manual specification. Across 20 LLMs and seven benchmarks, RE-ZS-CoT frequently surpasses zero-shot and zero-shot-CoT baselines, achieving performance improvements of up to 44 percentage points. The results reveal a strong correspondence between static and dynamic versions; the benchmarks where static roles yielded improvements were almost always those where dynamic roles also outperformed baselines, though static selection achieved peak performance. Ablation studies further show that unconventional roles degrade performance, underscoring the necessity of task-role alignment. The framework's scalability is validated across model sizes (2b-14b parameters), with smaller models like Granite3.3-8b achieving remarkable proficiency in arithmetic reasoning. RE-ZS-CoT advances zero-shot prompting by unifying role specialization with chain-of-thought reasoning, offering a practical, resource-efficient solution for improving LLM capabilities across diverse domains.", "url": "https://wpnews.pro/news/a-large-scale-evaluation-of-role-enhanced-zero-shot-chain-of-thought-prompting", "canonical_source": "https://www.machinebrief.com/news/a-large-scale-evaluation-of-role-enhanced-zero-shot-chain-of-ofkh", "published_at": "2026-10-22 04:00:00+00:00", "updated_at": "2026-10-22 04:41:16.172169+00:00", "lang": "en", "topics": ["large-language-models", "ai-research", "natural-language-processing", "artificial-intelligence"], "entities": ["arXiv", "RE-ZS-CoT", "Granite3.3-8b"], "also_reported_by": [], "alternates": {"html": "https://wpnews.pro/news/a-large-scale-evaluation-of-role-enhanced-zero-shot-chain-of-thought-prompting", "markdown": "https://wpnews.pro/news/a-large-scale-evaluation-of-role-enhanced-zero-shot-chain-of-thought-prompting.md", "text": "https://wpnews.pro/news/a-large-scale-evaluation-of-role-enhanced-zero-shot-chain-of-thought-prompting.txt", "jsonld": "https://wpnews.pro/news/a-large-scale-evaluation-of-role-enhanced-zero-shot-chain-of-thought-prompting.jsonld"}}