Search Results for author: Daniel J. Lizotte

Found 10 papers, 1 papers with code

Towards understanding the bias in decision trees

no code implementations9 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.

Challenges learning from imbalanced data using tree-based models: Prevalence estimates systematically depend on hyperparameters and can be upwardly biased

no code implementations17 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.

Binary Classification

Using Platt's scaling for calibration after undersampling -- limitations and how to address them

no code implementations22 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.

Hybrid Feature- and Similarity-Based Models for Joint Prediction and Interpretation

no code implementations12 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.

Decision-Directed Data Decomposition

1 code implementation18 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.

Word Embeddings

On Prediction and Tolerance Intervals for Dynamic Treatment Regimes

no code implementations24 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.

gLOP: the global and Local Penalty for Capturing Predictive Heterogeneity

no code implementations29 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.

Generative Multiple-Instance Learning Models For Quantitative Electromyography

no code implementations26 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.

Multiple Instance Learning

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