The Importance of Category Labels in Grammar Induction with Child-directed Utterances
Lifeng Jin, William Schuler · 2020
Recent progress in grammar induction has shown that grammar induction is possible without explicit assumptions of languagespecific knowledge.However, evaluation of induced grammars usually has ignored phrasal labels, an essential part of a grammar.Experiments in this work using a labeled evaluation metric, RH, show that linguistically motivated predictions about grammar sparsity and use of categories can only be revealed through labeled evaluation.Furthermore, depth-bounding as an implementation of human memory constraints in grammar inducers is still effective with labeled evaluation on multilingual transcribed child-directed utterances.