Poster
Word Features for Latent Dirichlet Allocation
James Petterson · Alexander Smola · Tiberio Caetano · Wray L Buntine · Shravan M Narayanamurthy

Wed Dec 8th 12:00 -- 12:00 AM @ None #None

We extend Latent Dirichlet Allocation (LDA) by explicitly allowing for the encoding of side information in the distribution over words. This results in a variety of new capabilities, such as improved estimates for infrequently occurring words, as well as the ability to leverage thesauri and dictionaries in order to boost topic cohesion within and across languages. We present experiments on multi-language topic synchronisation where dictionary information is used to bias corresponding words towards similar topics. Results indicate that our model substantially improves topic cohesion when compared to the standard LDA model.

Author Information

James Petterson (NICTA)
Alex Smola (Amazon - We are hiring!)

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Tiberio Caetano (NICTA Canberra)
Wray L Buntine (NICTA)
Shravan M Narayanamurthy (Yahoo)

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