Search Results for author: Ofra Amir

Found 10 papers, 6 papers with code

Explaining Reinforcement Learning Agents Through Counterfactual Action Outcomes

1 code implementation18 Dec 2023 Yotam Amitai, Yael Septon, Ofra Amir

Explainable reinforcement learning (XRL) methods aim to help elucidate agent policies and decision-making processes.

counterfactual Decision Making +1

ASQ-IT: Interactive Explanations for Reinforcement-Learning Agents

no code implementations24 Jan 2023 Yotam Amitai, Guy Avni, Ofra Amir

As reinforcement learning methods increasingly amass accomplishments, the need for comprehending their solutions becomes more crucial.

reinforcement-learning Reinforcement Learning (RL)

Integrating Policy Summaries with Reward Decomposition for Explaining Reinforcement Learning Agents

no code implementations21 Oct 2022 Yael Septon, Tobias Huber, Elisabeth André, Ofra Amir

Methods that help users understand the behavior of such agents can roughly be divided into local explanations that analyze specific decisions of the agents and global explanations that convey the general strategy of the agents.

Decision Making reinforcement-learning +1

Dataset and Case Studies for Visual Near-Duplicates Detection in the Context of Social Media

1 code implementation14 Mar 2022 Hana Matatov, Mor Naaman, Ofra Amir

The massive spread of visual content through the web and social media poses both challenges and opportunities.

Image Retrieval Retrieval

"I Don't Think So": Summarizing Policy Disagreements for Agent Comparison

no code implementations5 Feb 2021 Yotam Amitai, Ofra Amir

In this paper, we propose a novel method for generating dependent and contrastive summaries that emphasize the differences between agent policies by identifying states in which the agents disagree on the best course of action.

VoterFraud2020: a Multi-modal Dataset of Election Fraud Claims on Twitter

1 code implementation20 Jan 2021 Anton Abilov, Yiqing Hua, Hana Matatov, Ofra Amir, Mor Naaman

The wide spread of unfounded election fraud claims surrounding the U. S. 2020 election had resulted in undermining of trust in the election, culminating in violence inside the U. S. capitol.

Social and Information Networks

Learning to Characterize Matching Experts

1 code implementation2 Dec 2020 Roee Shraga, Ofra Amir, Avigdor Gal

Matching is a task at the heart of any data integration process, aimed at identifying correspondences among data elements.

Data Integration valid

Local and Global Explanations of Agent Behavior: Integrating Strategy Summaries with Saliency Maps

1 code implementation18 May 2020 Tobias Huber, Katharina Weitz, Elisabeth André, Ofra Amir

Specifically, we augment strategy summaries that extract important trajectories of states from simulations of the agent with saliency maps which show what information the agent attends to.

Atari Games Decision Making +3

Exploring Computational User Models for Agent Policy Summarization

1 code implementation30 May 2019 Isaac Lage, Daphna Lifschitz, Finale Doshi-Velez, Ofra Amir

We introduce an imitation learning-based approach to policy summarization; we demonstrate through computational simulations that a mismatch between the model used to extract a summary and the model used to reconstruct the policy results in worse reconstruction quality; and we demonstrate through a human-subject study that people use different models to reconstruct policies in different contexts, and that matching the summary extraction model to these can improve performance.

Imitation Learning

Frustratingly Easy Truth Discovery

no code implementations2 May 2019 Reshef Meir, Ofra Amir, Omer Ben-Porat, Tsviel Ben-Shabat, Gal Cohensius, Lirong Xia

Truth discovery is a general name for a broad range of statistical methods aimed to extract the correct answers to questions, based on multiple answers coming from noisy sources.

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