... ’ indicatesthat the featurevalue ofthe first cat-egory is either significantly higher or lower than the second. Note that, for each of the pairs, thereis at least one prosodic feature that distinguishes the ... classification. Of the features that appearin the ruleset, about half are features of currentturn and half features of the prior context. Onlyonce does a system featureappear, suggesting that the rules ... they ap-pear independent of system characteristics. Also, of the contextual features appearing in the rules,about half are prosodic features and half ASR-related; and, of the current turn features,...