Pragmatic Evaluation of Clarifying Questions with Fact-Level Masking

• URL: http://arxiv.org/abs/2310.11571v2
• Date: Sun, 7 Jan 2024 21:01:55 GMT
• Title: Pragmatic Evaluation of Clarifying Questions with Fact-Level Masking
• Authors: Matthew Toles, Yukun Huang, Zhou Yu, Luis Gravano
• Abstract summary: We present a definition and framework for natural language pragmatic asking of clarifying questions (PACQ) We also present fact-level masking (FLM), a procedure for converting natural language datasets into self-supervised PACQ datasets. Our experiments show that current zero-shot models struggle to ask questions that retrieve useful information, as compared to human annotators.
• Score: 21.480602733510256
• License: http://creativecommons.org/licenses/by-sa/4.0/
• Abstract: The ability to derive useful information by asking clarifying questions (ACQ) is an important element of real life collaboration on reasoning tasks, such as question answering (QA). Existing natural language ACQ challenges, however, evaluate generations based on word overlap rather than the value of the information itself. Word overlap is often an inappropriate metric for question generation since many different questions could be useful in a given situation, and a single question can be phrased many different ways. Instead, we propose evaluating questions pragmatically based on the value of the information they retrieve. Here we present a definition and framework for natural language pragmatic asking of clarifying questions (PACQ), the problem of generating questions that result in answers useful for a reasoning task. We also present fact-level masking (FLM), a procedure for converting natural language datasets into self-supervised PACQ datasets by omitting particular critical facts. Finally, we generate a PACQ dataset from the HotpotQA dataset using FLM and evaluate several zero-shot language models on it. Our experiments show that current zero-shot models struggle to ask questions that retrieve useful information, as compared to human annotators. These results demonstrate an opportunity to use FLM datasets and the PACQ framework to objectively evaluate and improve question generation and other language models.

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