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Maria Lymperaiou

11 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

PAKTON: A Multi-Agent Framework for Question Answering in Long Legal Agreements

EMNLP 2025

Contract review is a complex and time-intensive task that typically demands specialized legal expertise, rendering it largely inaccessible to non-experts. Moreover, legal interpretation is rarely straightforward—ambiguity is pervasive, and judgments often hinge on subjective assessments. Compounding

2025

Pitfalls of Scale: Investigating the Inverse Task of Redefinition in Large Language Models

ACL 2025finding

Inverse tasks can uncover potential reasoning gaps as Large Language Models (LLMs) scale up. In this work, we explore the redefinition task, in which we assign alternative values to well-known physical constants and units of measure, prompting LLMs to respond accordingly. Our findings show that not…

Cited by 0SourcePDFScholar
2025

RISCORE: Enhancing In-Context Riddle Solving in Language Models through Context-Reconstructed Example Augmentation

COLING 2025main

Riddle-solving requires advanced reasoning skills, pushing Large Language Models (LLMs) to engage in abstract thinking and creative problem-solving, often revealing limitations in their cognitive abilities. In this paper, we examine the riddle-solving capabilities of LLMs using a multiple-choice for…

2025

SCENIR: Visual Semantic Clarity through Unsupervised Scene Graph Retrieval

ICML 2025poster

Despite the dominance of convolutional and transformer-based architectures in image-to-image retrieval, these models are prone to biases arising from low-level visual features, such as color. Recognizing the lack of semantic understanding as a key limitation, we propose a novel scene graph-based ret…

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

Puzzle Solving using Reasoning of Large Language Models: A Survey

EMNLP 2024main

Exploring the capabilities of Large Language Models (LLMs) in puzzle solving unveils critical insights into their potential and challenges in AI, marking a significant step towards understanding their applicability in complex reasoning tasks. This survey leverages a unique taxonomy—dividing puzzles…

Cited by 30SourcePDFScholar
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

Large Language Models and Multimodal Retrieval for Visual Word Sense Disambiguation

EMNLP 2023long main

Visual Word Sense Disambiguation (VWSD) is a novel challenging task with the goal of retrieving an image among a set of candidates, which better represents the meaning of an ambiguous word within a given context. In this paper, we make a substantial step towards unveiling this interesting task by ap…

Cited by 0SourcecodeScholar
2022

Towards Explainable Evaluation of Language Models on the Semantic Similarity of Visual Concepts

COLING 2022main

Recent breakthroughs in NLP research, such as the advent of Transformer models have indisputably contributed to major advancements in several tasks. However, few works research robustness and explainability issues of their evaluation strategies. In this work, we examine the behavior of high-performi…

Cited by 12SourcePDFScholar