Roberta with Low-Rank Adaptation and Hierarchical Attention for Hallucination Detection in LLMs

The prevalence of hallucinations in responses generated by large language models (LLMs) poses significant challenges for the reliability of natural language processing applications. This study addresses the detection of such hallucinations through an enhanced Roberta-base model, specifically targeting hallucination responses produced by the Mistral 7B Instruct model. By implementing Low-Rank Adaptation (LoRA) for fine-tuning and incorporating hierarchical multi-head attention and multi-level self-attention weighting mechanisms, we aim to improve both the accuracy of hallucination detection and the interpretability of the model’s decisions. Our experimental results demonstrate that the proposed model significantly outperforms baseline models across various metrics, including accuracy, precision, recall, and area under the curve (AUC). Future research directions will explore the integration of larger-scale models and additional fine-tuning techniques to further bolster the model’s capacity for detecting hallucinations, thereby enhancing the reliability of LLM outputs.