no code implementations • 9 Jan 2025 • Nathan Phelps, Daniel J. Lizotte, Douglas G. Woolford
In this study, we show that this belief is not necessarily correct for decision trees, and that their bias can actually be in the opposite direction.
no code implementations • 17 Dec 2024 • Nathan Phelps, Daniel J. Lizotte, Douglas G. Woolford
One way of accounting for this bias is to analytically map the resulting predictions to new values based on the sampling rate for the majority class, which was used to create the training dataset.
no code implementations • 22 Oct 2024 • Nathan Phelps, Daniel J. Lizotte, Douglas G. Woolford
We show analytically, as well as via a simulation study and a case study, that Platt's scaling should not be used for calibration after undersampling without critical thought.
no code implementations • 23 Oct 2023 • Nathan Phelps, Stephanie Marrocco, Stephanie Cornell, Dalton L. Wolfe, Daniel J. Lizotte
Reinforcement learning (RL) has helped improve decision-making in several applications.
no code implementations • 12 Apr 2022 • Jacqueline K. Kueper, Jennifer Rayner, Daniel J. Lizotte
Electronic health records (EHRs) include simple features like patient age together with more complex data like care history that are informative but not easily represented as individual features.
1 code implementation • 18 Sep 2019 • Brent D. Davis, Ethan Jackson, Daniel J. Lizotte
We present an algorithm, Decision-Directed Data Decomposition (D4), which decomposes a dataset into two components.
no code implementations • 24 Apr 2017 • Daniel J. Lizotte, Arezoo Tahmasebi
We develop and evaluate tolerance interval methods for dynamic treatment regimes (DTRs) that can provide more detailed prognostic information to patients who will follow an estimated optimal regime.
no code implementations • 29 Jul 2016 • Rhiannon V. Rose, Daniel J. Lizotte
However, in practice, problems can exhibit predictive heterogeneity: most instances might be relatively easy to predict, while others might be predictive outliers for which a model trained on the entire dataset does not perform well.
no code implementations • 26 Sep 2013 • Tameem Adel, Benn Smith, Ruth Urner, Daniel Stashuk, Daniel J. Lizotte
We present a comprehensive study of the use of generative modeling approaches for Multiple-Instance Learning (MIL) problems.
no code implementations • NeurIPS 2011 • Daniel J. Lizotte
Fitted value iteration (FVI) with ordinary least squares regression is known to diverge.