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Konstantinos Thomas

5 accepted papers

2025

Bias Beware: The Impact of Cognitive Biases on LLM-Driven Product Recommendations

EMNLP 2025

The advent of Large Language Models (LLMs) has revolutionized product recommenders, yet their susceptibility to adversarial manipulation poses critical challenges, particularly in real-world commercial applications. Our approach is the first one to tap into human psychological principles, seamlessly

2025

V-CECE: Visual Counterfactual Explanations via Conceptual Edits

NeurIPS 2025poster

Recent black-box counterfactual generation frameworks fail to take into account the semantic content of the proposed edits, while relying heavily on training to guide the generation process. We propose a novel, plug-and-play black-box counterfactual generation framework, which suggests step-by-step…

Cited by 2SourceScholar
2024

Structure Your Data: Towards Semantic Graph Counterfactuals

ICML 2024poster

Counterfactual explanations (CEs) based on concepts are explanations that consider alternative scenarios to understand which high-level semantic features contributed to particular model predictions. In this work, we propose CEs based on the semantic graphs accompanying input data to achieve more des…

2024

”I Never Said That”: A dataset, taxonomy and baselines on response clarity classification

EMNLP 2024finding

Equivocation and ambiguity in public speech are well-studied discourse phenomena, especially in political science and analysis of political interviews. Inspired by the well-grounded theory on equivocation, we aim to resolve the closely related problem of response clarity in questions extracted from…

2023

Choose your Data Wisely: A Framework for Semantic Counterfactuals

IJCAI 2023poster

Counterfactual explanations have been argued to be one of the most intuitive forms of explanation. They are typically defined as a minimal set of edits on a given data sample that, when applied, changes the output of a model on that sample. However, a minimal set of edits is not always clear and und…