Table 4:
BARTScore correlation to human faithfulness labels by summary granularity (processing the full summary at once as opposed to sentence-by-sentence).
| Summary Granularity | Source Alignment | Pearson Correlation |
|---|---|---|
| Summary | ROUGE-Gain | .438 |
| Level | ROUGE-TopK | .424 |
|
| ||
| Sentence | ROUGE-Gain | .516 |
| Level | ROUGE-TopK | .481 |