Core Concepts
Mutual information between source texts and summaries is a task-agnostic measure of summarizer effectiveness.
Stats
"We introduce COSMIC as a practical implementation of this metric, demonstrating its strong correlation with human judgment-based metrics and its effectiveness in predicting downstream task performance."
"We show that summarizers that induce a summary distribution with higher MI with the source texts’ distribution are higher quality in the following sense — they tend to produce summaries that preserve outcomes on downstream tasks as compared to using the source texts."
Quotes
"Assessing the quality of summarizers poses significant challenges."
"Mutual information between source texts and summaries is a task-agnostic measure of summarizer effectiveness."