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Sayan Ghosh

14 accepted papers

2025

Efficient Evaluation of Multi-Task Robot Policies With Active Experiment Selection

CoRL 2025poster

Evaluating learned robot control policies to determine their performance costs the experimenter time and effort. As robots become more capable in accomplishing diverse tasks, evaluating across all these tasks becomes more difficult as it is impractical to test every policy on every task multiple tim…

Cited by 0SourceScholar
2025

Enhancing Language Model Agents using Diversity of Thoughts

ICLR 2025poster

A popular approach to building agents using Language Models (LMs) involves iteratively prompting the LM, reflecting on its outputs, and updating the input prompts until the desired task is achieved. However, our analysis reveals two key shortcomings in the existing methods: $(i)$ limited exploration…

Cited by 1SourcePDFScholar
2024

Compare without Despair: Reliable Preference Evaluation with Generation Separability

EMNLP 2024finding

Human evaluation of generated language through pairwise preference judgments is pervasive. However, under common scenarios, such as when generations from a model pair are very similar, or when stochastic decoding results in large variations in generations, it results in inconsistent preference ratin…

2023

Beyond Labels: Empowering Human Annotators with Natural Language Explanations through a Novel Active-Learning Architecture

EMNLP 2023long findings

Real-world domain experts (e.g., doctors) rarely annotate only a decision label in their day-to-day workflow without providing explanations. Yet, existing low-resource learning techniques, such as Active Learning (AL), that aim to support human annotators mostly focus on the label while neglecting t…

Cited by 0SourcecodeScholar
2023

LaSQuE: Improved Zero-Shot Classification from Explanations Through Quantifier Modeling and Curriculum Learning

ACL 2023findings

A hallmark of human intelligence is the ability to learn new concepts purely from language. Several recent approaches have explored training machine learning models via natural language supervision. However, these approaches fall short in leveraging linguistic quantifiers (such as ‘always’ or ‘rarel…

Cited by 2SourcePDFScholar
2023

Leveraging Multiple Teachers for Test-Time Adaptation of Language-Guided Classifiers

EMNLP 2023long findings

Recent approaches have explored language- guided classifiers capable of classifying examples from novel tasks when provided with task-specific natural language explanations, instructions or prompts (Sanh et al., 2022; R. Menon et al., 2022). While these classifiers can generalize in zero-shot settin…

Cited by 0SourcecodeScholar
2023

Pragmatic Reasoning Unlocks Quantifier Semantics for Foundation Models

EMNLP 2023long main

Generalized quantifiers (e.g., $\textit{few}$, $\textit{most}$) are used to indicate the proportions predicates satisfy (for example, $\textit{some}$ apples are red). One way to interpret quantifier semantics is to explicitly bind these satisfactions with percentage scopes (e.g., 30%-40% of apples a…

Cited by 0SourcecodeScholar
2022

CLUES: A Benchmark for Learning Classifiers using Natural Language Explanations

ACL 2022long

Supervised learning has traditionally focused on inductive learning by observing labeled examples of a task. In contrast, a hallmark of human intelligence is the ability to learn new concepts purely from language. Here, we explore training zero-shot classifiers for structured data purely from langua…

2022

ePiC: Employing Proverbs in Context as a Benchmark for Abstract Language Understanding

ACL 2022long

While large language models have shown exciting progress on several NLP benchmarks, evaluating their ability for complex analogical reasoning remains under-explored. Here, we introduce a high-quality crowdsourced dataset of narratives for employing proverbs in context as a benchmark for abstract lan…

2021

Adversarial Scrubbing of Demographic Information for Text Classification

EMNLP 2021main

Contextual representations learned by language models can often encode undesirable attributes, like demographic associations of the users, while being trained for an unrelated target task. We aim to scrub such undesirable attributes and learn fair representations while maintaining performance on the…

2021

How Helpful is Inverse Reinforcement Learning for Table-to-Text Generation?

ACL 2021short

Existing approaches for the Table-to-Text task suffer from issues such as missing information, hallucination and repetition. Many approaches to this problem use Reinforcement Learning (RL), which maximizes a single manually defined reward, such as BLEU. In this work, we instead pose the Table-to-Tex…

2021

Mapping Language to Programs using Multiple Reward Components with Inverse Reinforcement Learning

EMNLP 2021finding

Mapping natural language instructions to programs that computers can process is a fundamental challenge. Existing approaches focus on likelihood-based training or using reinforcement learning to fine-tune models based on a single reward. In this paper, we pose program generation from language as Inv…