Human evaluation techniques for LLM-based RAG
While automated metrics provide valuable insights, human evaluation remains the gold standard for assessing the overall quality and effectiveness of RAG systems. Human judgment is particularly crucial for evaluating aspects that are difficult to capture with automated metrics, such as the nuanced relevance of retrieved information, the coherence and fluency of generated text, and the overall helpfulness of the response in addressing the user’s need.
Human evaluators can assess various aspects of RAG system performance:
- Relevance: How relevant is the generated response to the user’s query? Does it address the specific information needed expressed in the query?
- Groundedness/faithfulness: Is the generated response factually supported by the retrieved context? Does it avoid hallucinating or contradicting the provided information?
- Coherence and fluency: Is the generated response well-structured, easy to understand...