The Viability of Crowdsourcing for RAG Evaluation

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Main Authors: Gienapp, Lukas, Hagen, Tim, Fröbe, Maik, Hagen, Matthias, Stein, Benno, Potthast, Martin, Scells, Harrisen
Format: Preprint
Published: 2025
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author Gienapp, Lukas
Hagen, Tim
Fröbe, Maik
Hagen, Matthias
Stein, Benno
Potthast, Martin
Scells, Harrisen
author_facet Gienapp, Lukas
Hagen, Tim
Fröbe, Maik
Hagen, Matthias
Stein, Benno
Potthast, Martin
Scells, Harrisen
contents How good are humans at writing and judging responses in retrieval-augmented generation (RAG) scenarios? To answer this question, we investigate the efficacy of crowdsourcing for RAG through two complementary studies: response writing and response utility judgment. We present the Crowd RAG Corpus 2025 (CrowdRAG-25), which consists of 903 human-written and 903 LLM-generated responses for the 301 topics of the TREC RAG'24 track, across the three discourse styles 'bulleted list', 'essay', and 'news'. For a selection of 65 topics, the corpus further contains 47,320 pairwise human judgments and 10,556 pairwise LLM judgments across seven utility dimensions (e.g., coverage and coherence). Our analyses give insights into human writing behavior for RAG and the viability of crowdsourcing for RAG evaluation. Human pairwise judgments provide reliable and cost-effective results compared to LLM-based pairwise or human/LLM-based pointwise judgments, as well as automated comparisons with human-written reference responses. All our data and tools are freely available.
format Preprint
id arxiv_https___arxiv_org_abs_2504_15689
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle The Viability of Crowdsourcing for RAG Evaluation
Gienapp, Lukas
Hagen, Tim
Fröbe, Maik
Hagen, Matthias
Stein, Benno
Potthast, Martin
Scells, Harrisen
Information Retrieval
How good are humans at writing and judging responses in retrieval-augmented generation (RAG) scenarios? To answer this question, we investigate the efficacy of crowdsourcing for RAG through two complementary studies: response writing and response utility judgment. We present the Crowd RAG Corpus 2025 (CrowdRAG-25), which consists of 903 human-written and 903 LLM-generated responses for the 301 topics of the TREC RAG'24 track, across the three discourse styles 'bulleted list', 'essay', and 'news'. For a selection of 65 topics, the corpus further contains 47,320 pairwise human judgments and 10,556 pairwise LLM judgments across seven utility dimensions (e.g., coverage and coherence). Our analyses give insights into human writing behavior for RAG and the viability of crowdsourcing for RAG evaluation. Human pairwise judgments provide reliable and cost-effective results compared to LLM-based pairwise or human/LLM-based pointwise judgments, as well as automated comparisons with human-written reference responses. All our data and tools are freely available.
title The Viability of Crowdsourcing for RAG Evaluation
topic Information Retrieval
url https://arxiv.org/abs/2504.15689