... headword of the node. In the following, the units of PIQ are bits. ConclusionAmong the feature types in the same structuralposition of the parsing tree, the predictiveinformation quantity of lexical ... calculatepredictive information quantity, predictiveinformation gain, predictive informationredundancy and predictive informationsummation. The other 10% of the corpus(133,814 words) is taken as the held-out ... ,Fm;R), the predictive informationsummation of feature type combinationF1,F2, ,Fm, is defined as the total informationthat F1,F2, ,Fm can provide for the prediction of a derivation...