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Atalanti A Mastakouri

6 accepted papers

2025

QA-Calibration of Language Model Confidence Scores

ICLR 2025poster

To use generative question-and-answering (QA) systems for decision-making and in any critical application, these systems need to provide well-calibrated confidence scores that reflect the correctness of their answers. Existing calibration methods aim to ensure that the confidence score is, *on avera…

Cited by 0SourcePDFScholar
2025

Toward Falsifying Causal Graphs Using a Permutation-Based Test

AAAI 2025technical

Understanding causal relationships among the variables of a system is paramount to explain and control its behavior. For many real-world systems, however, the true causal graph is not readily available and one must resort to predictions made by algorithms or domain experts. Therefore, metrics that q…

2024

Quantifying intrinsic causal contributions via structure preserving interventions

AISTATS 2024poster

We propose a notion of causal influence that describes the ‘intrinsic’ part of the contribution of a node on a target node in a DAG. By recursively writing each node as a function of the upstream noise terms, we separate the intrinsic information added by each node from the one obtained from its anc…

Cited by 11SourcePDFScholar
2024

Self-Compatibility: Evaluating Causal Discovery without Ground Truth

AISTATS 2024poster

As causal ground truth is incredibly rare, causal discovery algorithms are commonly only evaluated on simulated data. This is concerning, given that simulations reflect preconceptions about generating processes regarding noise distributions, model classes, and more. In this work, we propose a novel…

2023

Assumption violations in causal discovery and the robustness of score matching

NeurIPS 2023poster

When domain knowledge is limited and experimentation is restricted by ethical, financial, or time constraints, practitioners turn to observational causal discovery methods to recover the causal structure, exploiting the statistical properties of their data. Because causal discovery without further a…

2021

Necessary and sufficient conditions for causal feature selection in time series with latent common causes

ICML 2021spotlight

We study the identification of direct and indirect causes on time series with latent variables, and provide a constrained-based causal feature selection method, which we prove that is both sound and complete under some graph constraints. Our theory and estimation algorithm require only two condition…

Cited by 55SourcePDFScholar