Due to speech recognition imperfections, recognition results need to be verified before being used in real-life applications.
Here we present two perspectives for recognition verification: direct classification and partial classification based on confidence
measures. Linear classifiers, decision trees and perceptrons are used here as direct classifiers. On the other hand, we compute
confidence measures through several methods, being MLP’s and evolutionary fuzzy systems the best performing ones. Experimentation
with three types of speech input reveals that higher correct verification rates can be achieved when verification is based
on confidence measures. Moreover, classification rates can be improved when verification does not have to deal with “uncertain”
examples, which are not classified. Partial classification represents a trade-off between verification accuracy and the number
of recognition results verified.