The Shared Logistic Normal Distribution for Grammar Induction
Shay B. Cohen, Noah Smith · 2008
We present a shared logistic normal distribution as a Bayesian prior over probabilistic grammar weights. This approach generalizes the similar use of logistic normal distributions [3], enabling soft parameter tying during inference across different multinomials comprising the probabilistic grammar. We show that this model outperforms previous approaches on an unsupervised dependency grammar induction task. 1