Assessing the factual consistency of automatically generated texts in
relation to source context is crucial for developing reliable natural language
generation applications. Recent literature proposes AlignScore which uses a
unified alignment model to evaluate factual consistency and substantially
outperforms previous methods across many benchmark tasks. In this paper, we
take a closer look of datasets used in AlignScore and uncover an unexpected
finding: utilizing a smaller number of data points can actually improve
performance. We process the original AlignScore training dataset to remove
noise, augment with robustness-enhanced samples, and utilize a subset
comprising 10\% of the data to train an improved factual consistency evaluation
model, we call LIM-RA (Less Is More for Robust AlignScore). LIM-RA demonstrates
superior performance, consistently outperforming AlignScore and other strong
baselines like ChatGPT across four benchmarks (two utilizing traditional
natural language generation datasets and two focused on large language model
outputs). Our experiments show that LIM-RA achieves the highest score on 24 of
the 33 test datasets, while staying competitive on the rest, establishing the
new state-of-the-art benchmarks.

我们研究了 AlignScore 数据集，并发现使用较少的数据点实际上可以提高性能，因此我们使用 10％的数据集训练了一个改进的模型 LIM-RA，该模型在四个基准测试中表现出卓越的性能，成为新的最先进基准模型。