Fact · Speech recognition
The NIST sclite scorer reports the percent of correct words as the number of correct words divided by the number of reference words, and reports inserted words as a separate percentage.
Checked against its source on October 17, 2026
In the source's own words
“Percent of correct words = # Correct words # Reference words * 100”
sclite: Score Speech Recognition System Output (NIST Scoring Toolkit documentation), NIST Speech Group, NIST Speech Recognition Scoring Toolkit (SCTK), documentation hosted at MIT, n.d., Scoring output categories.
Open the original- What it measures
- sclite is the scoring program used in many speech research papers. Its word categories are tallied against the reference, so a system's percent correct can stay high while its insertions add to the error count.
- What it does not show
- The quoted formula is from the sclite documentation of the version that page describes. Later releases may report additional measures.