On the Calibration and Uncertainty with P\'{o}lya-Gamma Augmentation for Dialog Retrieval Models

• URL: http://arxiv.org/abs/2303.08606v1
• Date: Wed, 15 Mar 2023 13:26:25 GMT
• Title: On the Calibration and Uncertainty with P\'{o}lya-Gamma Augmentation for Dialog Retrieval Models
• Authors: Tong Ye, Shijing Si, Jianzong Wang, Ning Cheng, Zhitao Li, Jing Xiao
• Abstract summary: dialog response retrieval models output a single score for a response on how relevant it is to a given question. Bad calibration of deep neural network results in various uncertainty for the single score such that the unreliable predictions always misinform user decisions. We present an efficient calibration and uncertainty estimation framework PG-DRR for dialog response retrieval models.
• Score: 30.519215651368683
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Deep neural retrieval models have amply demonstrated their power but estimating the reliability of their predictions remains challenging. Most dialog response retrieval models output a single score for a response on how relevant it is to a given question. However, the bad calibration of deep neural network results in various uncertainty for the single score such that the unreliable predictions always misinform user decisions. To investigate these issues, we present an efficient calibration and uncertainty estimation framework PG-DRR for dialog response retrieval models which adds a Gaussian Process layer to a deterministic deep neural network and recovers conjugacy for tractable posterior inference by P\'{o}lya-Gamma augmentation. Finally, PG-DRR achieves the lowest empirical calibration error (ECE) in the in-domain datasets and the distributional shift task while keeping $R_{10}@1$ and MAP performance.

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