← Search

Ashkan Yousefpour

7 accepted papers

2025

ELITE: Enhanced Language-Image Toxicity Evaluation for Safety

ICML 2025poster

Current Vision Language Models (VLMs) remain vulnerable to malicious prompts that induce harmful outputs. Existing safety benchmarks for VLMs primarily rely on automated evaluation methods, but these methods struggle to detect implicit harmful content or produce inaccurate evaluations. Therefore, we…

Cited by 0SourcePDFScholar
2025

Large Language Models Still Exhibit Bias in Long Text

ACL 2025finding

Existing fairness benchmarks for large language models (LLMs) primarily focus on simple tasks, such as multiple-choice questions, overlooking biases that may arise in more complex scenarios like long-text generation. To address this gap, we introduce the Long Text Fairness Test (LTF-TEST), a framewo…

Cited by 0SourcePDFScholar
2025

M2S: Multi-turn to Single-turn jailbreak in Red Teaming for LLMs

ACL 2025long

We introduce a novel framework for consolidating multi-turn adversarial “jailbreak” prompts into single-turn queries, significantly reducing the manual overhead required for adversarial testing of large language models (LLMs). While multi-turn human jailbreaks have been shown to yield high attack su…

2025

Representation Bending for Large Language Model Safety

ACL 2025long

Large Language Models (LLMs) have emerged as powerful tools, but their inherent safety risks – ranging from harmful content generation to broader societal harms – pose significant challenges. These risks can be amplified by the recent adversarial attacks, fine-tuning vulnerabilities, and the increas…

2024

Aligning Large Language Models by On-Policy Self-Judgment

ACL 2024long

Existing approaches for aligning large language models with human preferences face a trade-off that requires a separate reward model (RM) for on-policy learning. In this paper, we present a novel alignment framework, SELF-JUDGE that (1) does on-policy learning and 2) is parameter efficient, as it do…

2024

Selective Vision is the Challenge for Visual Reasoning: A Benchmark for Visual Argument Understanding

EMNLP 2024main

Visual arguments, often used in advertising or social causes, rely on images to persuade viewers to do or believe something. Understanding these arguments requires selective vision: only specific visual stimuli within an image are relevant to the argument, and relevance can only be understood within…

2022

Federated Learning with Buffered Asynchronous Aggregation

AISTATS 2022poster

Scalability and privacy are two critical concerns for cross-device federated learning (FL) systems. In this work, we identify that synchronous FL – cannot scale efficiently beyond a few hundred clients training in parallel. It leads to diminishing returns in model performance and training speed, ana…

Cited by 377SourcePDFScholar