Improving Dialog Evaluation with a Multi-reference Adversarial Dataset and Large Scale Pretraining (2020.tacl-1)
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| Challenge: | Existing models for dialog evaluation are trained using a single relevant response and multiple random negatives. |
| Approach: | They propose a dataset to test whether model-based dialog evaluation metrics can be used to train models . they propose n-gram based metrics and embedding based ones to be used for model-driven evaluation . |
| Outcome: | The proposed model outperforms existing models on a reddit dataset on relevant responses and adversarial responses. |
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Learning an Unreferenced Metric for Online Dialogue Evaluation (2020.acl-main)
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| Challenge: | Existing tools for dialogue evaluation do not generalize to unseen datasets and/or need a human-generated reference response during inference. |
| Approach: | They propose an unreferenced automated dialogue evaluation metric that uses large pre-trained language models to extract latent representations of utterances and leverages the temporal transitions that exist between them. |
| Outcome: | The proposed model achieves higher correlation with human annotations in an online setting, while not requiring true responses for comparison during inference. |
Dialogue Response Ranking Training with Large-Scale Human Feedback Data (2020.emnlp-main)
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| Challenge: | Existing open-domain dialog models can minimize the perplexity of target human responses . however, some human responses are more engaging than others, spawning more followup interactions . |
| Approach: | They train open-domain dialog models to minimize perplexity of target human responses . they use social media feedback data to train models to predict engaging dialog turns . |
| Outcome: | The proposed model outperforms existing models on 133M human feedback pairs . it also outperformed the conventional dialog perplexity baseline model . |
Designing Precise and Robust Dialogue Response Evaluators (2020.acl-main)
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| Challenge: | Existing automated dialogue response evaluators have only moderate correlation with human judgement and are not robust. |
| Approach: | They propose to build a reference-free dialogue response evaluator that exploits the power of semi-supervised training and pretrained (masked) language models. |
| Outcome: | The proposed model achieves strong correlation with human judgement and generalizes robustly to diverse responses and corpora. |
Pretraining Methods for Dialog Context Representation Learning (P19-1)
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| Challenge: | Existing methods for pretraining dialog context encoders are still in their infancy. |
| Approach: | They propose to use unsupervised pretraining objectives for dialog context representations to fine-tune and evaluate them on a set of downstream dialog tasks. |
| Outcome: | The proposed methods improve performance on a set of dialog tasks and are less data hungry. |
What is wrong with you?: Leveraging User Sentiment for Automatic Dialog Evaluation (2022.findings-acl)
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| Challenge: | Existing metrics for dialog evaluation are trained on human annotations, which is cumbersome to collect. |
| Approach: | They propose to use user sentiment and other information as proxy to measure the quality of previous dialogs. |
| Outcome: | The proposed model is comparable to models trained on human annotated data. |
DialogVED: A Pre-trained Latent Variable Encoder-Decoder Model for Dialog Response Generation (2022.acl-long)
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Wei Chen, Yeyun Gong, Song Wang, Bolun Yao, Weizhen Qi, Zhongyu Wei, Xiaowu Hu, Bartuer Zhou, Yi Mao, Weizhu Chen, Biao Cheng, Nan Duan
| Challenge: | Existing pre-trained dialog models shed light on various downstream tasks in natural language processing (NLP). |
| Approach: | They propose a dialog pre-training framework that introduces latent variables into the enhanced encoder-decoder pre-train framework to increase relevance and diversity of responses. |
| Outcome: | The proposed model achieves state-of-the-art on personaChat, DailyDialog, and DSTC7-AVSD datasets. |
Explaining Dialogue Evaluation Metrics using Adversarial Behavioral Analysis (2022.naacl-main)
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| Challenge: | Existing frameworks for dialogue model evaluation are lacking to investigate these biases . a number of dialogue metrics are biased and can cause unforeseen problems . |
| Approach: | They propose an adversarial test-suite which generates problematic variations of various dialogue aspects using automatic heuristics. |
| Outcome: | The proposed test-suite generates problematic variations of various dialogue aspects using automatic heuristics. |
RADDLE: An Evaluation Benchmark and Analysis Platform for Robust Task-oriented Dialog Systems (2021.acl-long)
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| Challenge: | Existing task-oriented dialog systems are less than satisfactory in robustness evaluation . existing systems are weak in robustity evaluation based on pre-training and fine-tuning . |
| Approach: | They propose to use a set of training examples to evaluate model generalization ability . they propose to include tasks with limited training data to favor models with strong generalization abilities . |
| Outcome: | The proposed model generalizes well with limited training data and is robust to user input across domains. |
DIALOGPT : Large-Scale Generative Pre-training for Conversational Response Generation (2020.acl-demos)
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Yizhe Zhang, Siqi Sun, Michel Galley, Yen-Chun Chen, Chris Brockett, Xiang Gao, Jianfeng Gao, Jingjing Liu, Bill Dolan
| Challenge: | DIALOGPT is a large, tunable neural conversational response generation model . trained on 147M conversation-like exchanges extracted from Reddit comment chains . |
| Approach: | They present a large, tunable neural conversational response generation model, DIALOGPT . the model is trained on 147M conversation-like exchanges extracted from Reddit comment chains . |
| Outcome: | The proposed model can generate more relevant, contentful and context-consistent responses than baseline systems. |
Synthesizing Adversarial Negative Responses for Robust Response Ranking and Evaluation (2021.findings-acl)
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| Challenge: | Open-domain neural dialogue models have achieved high performance in response ranking and evaluation tasks. |
| Approach: | They propose methods for automatically creating adversarial negative training data . they use mask-and-fill and keyword-guided approaches to generate negative examples . |
| Outcome: | The proposed approaches outperform baseline models in providing informative negative examples for training dialogue systems. |