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Omar Ghattas

3 accepted papers

2019

Disentangled behavioural representations

NeurIPS 2019poster

Individual characteristics in human decision-making are often quantified by fitting a parametric cognitive model to subjects' behavior and then studying differences between them in the associated parameter space. However, these models often fit behavior more poorly than recurrent neural net…

2019

Projected Stein Variational Newton: A Fast and Scalable Bayesian Inference Method in High Dimensions

NeurIPS 2019poster

We propose a projected Stein variational Newton (pSVN) method for high-dimensional Bayesian inference. To address the curse of dimensionality, we exploit the intrinsic low-dimensional geometric structure of the posterior distribution in the high-dimensional parameter space via its Hessian (of the lo…