Ask NAEP: A Generative AI Assistant for Querying Assessment Information

Abstract

Ask NAEP, a chatbot built with the Retrieval-Augmented Generation (RAG) technique, aims to provide accurate and comprehensive responses to queries about publicly available information of the National Assessment of Educational Progress (NAEP). This study presents an evaluation of this chatbot’s performance in generating high-quality responses. We conducted a series of experiments to explore the impact of incorporating a retrieval component into GPT-3.5 and GPT-4o large language models and evaluated the combined retrieval and generative processes. This work presents a multidimensional evaluation framework using an ordinal scale to assess three dimensions of chatbot performance: correctness, completeness, and communication. Human evaluators assessed the quality of responses across various NAEP subjects. The findings revealed that GPT-4o consistently outperformed GPT-3.5, with statistically significant improvements across all dimensions. Incorporating retrieval into the pipeline further enhanced performance. The RAG approach resulted in high-quality responses. Ask NAEP reduced the occurrence of hallucinations by increasing the correctness measure from 85.5% of questions to 92.7%, a 50% reduction in non-passing responses. The study demonstrates that leveraging large language models (LLMs) like GPT-4o, along with a robust RAG technique, significantly improves the quality of responses generated by the Ask NAEP chatbot. These enhancements can help users to better navigate the extensive NAEP documentation more effectively by providing accurate responses to their queries.

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