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Work item:
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P.807 Cor.1
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Subject/title:
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Scoring formula in clause 6.4
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Status:
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Consented on 2026-06-17
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Approval process:
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AAP
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Type of work item:
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Recommendation
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Version:
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New
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Equivalent number:
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-
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Timing:
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Not specified (Medium priority)
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Liaison:
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-
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Supporting members:
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-
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Summary:
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This corrigendum corrects an imprecision in the scoring formula presented in Recommendation ITU-T P.807 (02/2016), Section 6.4, for computing speech intelligibility scores adjusted for guessing. The current formula works correctly for two-alternative forced-choice tests (n=2) only. When applied to tests with more than two response alternatives, such as the Modified Rhyme Test (MRT; n=6), the formula significantly overcorrects for chance performance
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Comment:
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-
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Reference(s):
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Historic references:
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Contact(s):
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| ITU-T A.5 justification(s): |
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First registration in the WP:
2026-06-23 10:25:56
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Last update:
2026-06-24 11:09:56
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