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Alexandra Schofield

3 accepted papers

2022

More Than Words: Collocation Retokenization for Latent Dirichlet Allocation Models

ACL 2022findings

Traditionally, Latent Dirichlet Allocation (LDA) ingests words in a collection of documents to discover their latent topics using word-document co-occurrences. Previous studies show that representing bigrams collocations in the input can improve topic coherence in English. However, it is unclear how…

2021

How effective is BERT without word ordering? Implications for language understanding and data privacy

ACL 2021short

Ordered word sequences contain the rich structures that define language. However, it’s often not clear if or how modern pretrained language models utilize these structures. We show that the token representations and self-attention activations within BERT are surprisingly resilient to shuffling the o…

Cited by 50SourcePDFScholar
2019

Locally Private Bayesian Inference for Count Models

ICML 2019oral

We present a general and modular method for privacy-preserving Bayesian inference for Poisson factorization, a broad class of models that includes some of the most widely used models in the social sciences. Our method satisfies limited-precision local privacy, a generalization of local differential…

Cited by 43SourcePDFScholar