MOCHA: A Dataset for Training and Evaluating Generative Reading Comprehension Metrics

• URL: http://arxiv.org/abs/2010.03636v2
• Date: Thu, 15 Oct 2020 18:23:18 GMT
• Title: MOCHA: A Dataset for Training and Evaluating Generative Reading Comprehension Metrics
• Authors: Anthony Chen, Gabriel Stanovsky, Sameer Singh and Matt Gardner
• Abstract summary: We introduce a benchmark for training and evaluating generative reading comprehension metrics: MOdeling Correctness with Human. s. Using MOCHA, we train a Learned Evaluation metric for Reading Pearson, LERC, to mimic human judgement scores. LERC outperforms baseline metrics by 10 to 36 absolute points on held-out annotations. When we evaluate on minimal pairs, LERC achieves 80% accuracy, outperforming baselines by 14 to 26 absolute percentage points while leaving significant room for improvement.
• Score: 55.85042753772513
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Posing reading comprehension as a generation problem provides a great deal of flexibility, allowing for open-ended questions with few restrictions on possible answers. However, progress is impeded by existing generation metrics, which rely on token overlap and are agnostic to the nuances of reading comprehension. To address this, we introduce a benchmark for training and evaluating generative reading comprehension metrics: MOdeling Correctness with Human Annotations. MOCHA contains 40K human judgement scores on model outputs from 6 diverse question answering datasets and an additional set of minimal pairs for evaluation. Using MOCHA, we train a Learned Evaluation metric for Reading Comprehension, LERC, to mimic human judgement scores. LERC outperforms baseline metrics by 10 to 36 absolute Pearson points on held-out annotations. When we evaluate robustness on minimal pairs, LERC achieves 80% accuracy, outperforming baselines by 14 to 26 absolute percentage points while leaving significant room for improvement. MOCHA presents a challenging problem for developing accurate and robust generative reading comprehension metrics.

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