Search Results for author: Art B. Owen

Found 15 papers, 9 papers with code

Model free variable importance for high dimensional data

1 code implementation15 Nov 2022 Naofumi Hama, Masayoshi Mase, Art B. Owen

Here we present some model-free methods that do not require access to the prediction function.

Variable importance without impossible data

no code implementations31 May 2022 Masayoshi Mase, Art B. Owen, Benjamin B. Seiler

The most popular methods for measuring importance of the variables in a black box prediction algorithm make use of synthetic inputs that combine predictor variables from multiple subjects.

Attribute Fairness

Deletion and Insertion Tests in Regression Models

1 code implementation25 May 2022 Naofumi Hama, Masayoshi Mase, Art B. Owen

We find an expression for the expected value of the AUC under a random ordering of inputs to $f$ and propose an alternative area above a straight line for the regression setting.

Additive models Explainable Artificial Intelligence (XAI) +1

What makes you unique?

1 code implementation17 May 2021 Benjamin B. Seiler, Masayoshi Mase, Art B. Owen

We use Shapley value to combine all of the reductions in log cardinality due to revealing a variable after some subset of the other variables has been revealed.

Cohort Shapley value for algorithmic fairness

1 code implementation15 May 2021 Masayoshi Mase, Art B. Owen, Benjamin B. Seiler

Cohort Shapley value is a model-free method of variable importance grounded in game theory that does not use any unobserved and potentially impossible feature combinations.

Attribute Fairness

Quasi-Newton Quasi-Monte Carlo for variational Bayes

no code implementations7 Apr 2021 Sifan Liu, Art B. Owen

Many machine learning problems optimize an objective that must be measured with noise.

Second-order methods

Explaining black box decisions by Shapley cohort refinement

2 code implementations1 Nov 2019 Masayoshi Mase, Art B. Owen, Benjamin Seiler

Instead of changing the value of a predictor we include or exclude subjects similar to the target subject on that predictor to form a similarity cohort.

Deterministic parallel analysis

1 code implementation11 Nov 2017 Edgar Dobriban, Art B. Owen

This paper presents a deterministic version of PA (DPA), which is faster and more reproducible than PA. We show that DPA selects large factors and does not select small factors just like [Dobriban, 2017] shows for PA.

Methodology

Detecting Multiple Replicating Signals using Adaptive Filtering Procedures

1 code implementation11 Oct 2016 Jingshu Wang, Lin Gui, Weijie J. Su, Chiara Sabatti, Art B. Owen

Replicability is a fundamental quality of scientific discoveries: we are interested in those signals that are detectable in different laboratories, study populations, across time etc.

Methodology

Efficient moment calculations for variance components in large unbalanced crossed random effects models

1 code implementation31 Jan 2016 Katelyn Gao, Art B. Owen

Large crossed data sets, described by generalized linear mixed models, have become increasingly common and provide challenges for statistical analysis.

Methodology Computation

Statistically efficient thinning of a Markov chain sampler

no code implementations27 Oct 2015 Art B. Owen

That observation is often taken to mean that thinning MCMC output cannot improve statistical efficiency.

Confounder Adjustment in Multiple Hypothesis Testing

no code implementations17 Aug 2015 Jingshu Wang, Qingyuan Zhao, Trevor Hastie, Art B. Owen

In some of these studies, the multiple testing procedure can be severely biased by latent confounding factors such as batch effects and unmeasured covariates that correlate with both primary variable(s) of interest (e. g. treatment variable, phenotype) and the outcome.

Methodology Statistics Theory Statistics Theory 62H25, 62J15

Optimal Multiple Testing Under a Gaussian Prior on the Effect Sizes

4 code implementations12 Apr 2015 Edgar Dobriban, Kristen Fortney, Stuart K. Kim, Art B. Owen

For a Gaussian prior on effect sizes, we show that finding the optimal weights is a non-convex problem.

Methodology

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