Search Results for author: Navid Rekabsaz

Found 30 papers, 19 papers with code

Effective Controllable Bias Mitigation for Classification and Retrieval using Gate Adapters

1 code implementation29 Jan 2024 Shahed Masoudian, Cornelia Volaucnik, Markus Schedl, Navid Rekabsaz

Bias mitigation of Language Models has been the topic of many studies with a recent focus on learning separate modules like adapters for on-demand debiasing.

Fairness Retrieval

What the Weight?! A Unified Framework for Zero-Shot Knowledge Composition

1 code implementation23 Jan 2024 Carolin Holtermann, Markus Frohmann, Navid Rekabsaz, Anne Lauscher

The knowledge encapsulated in a model is the core factor determining its final performance on downstream tasks.

Benchmarking

ScaLearn: Simple and Highly Parameter-Efficient Task Transfer by Learning to Scale

1 code implementation2 Oct 2023 Markus Frohmann, Carolin Holtermann, Shahed Masoudian, Anne Lauscher, Navid Rekabsaz

We introduce ScaLearn, a simple and highly parameter-efficient two-stage MTL method that capitalizes on the knowledge of the source tasks by learning a minimal set of scaling parameters that enable effective knowledge transfer to a target task.

Multi-Task Learning

Leveraging Domain Knowledge for Inclusive and Bias-aware Humanitarian Response Entry Classification

1 code implementation26 May 2023 Nicolò Tamagnone, Selim Fekih, Ximena Contla, Nayid Orozco, Navid Rekabsaz

Accurate and rapid situation analysis during humanitarian crises is critical to delivering humanitarian aid efficiently and is fundamental to humanitarian imperatives and the Leave No One Behind (LNOB) principle.

counterfactual Data Augmentation +3

Enhancing the Ranking Context of Dense Retrieval Methods through Reciprocal Nearest Neighbors

1 code implementation25 May 2023 George Zerveas, Navid Rekabsaz, Carsten Eickhoff

Sparse annotation poses persistent challenges to training dense retrieval models; for example, it distorts the training signal when unlabeled relevant documents are used spuriously as negatives in contrastive learning.

Contrastive Learning Retrieval +1

Leveraging Vision-Language Models for Granular Market Change Prediction

no code implementations17 Jan 2023 Christopher Wimmer, Navid Rekabsaz

Predicting future direction of stock markets using the historical data has been a fundamental component in financial forecasting.

Stock Price Prediction Time Series +1

HumSet: Dataset of Multilingual Information Extraction and Classification for Humanitarian Crisis Response

1 code implementation10 Oct 2022 Selim Fekih, Nicolò Tamagnone, Benjamin Minixhofer, Ranjan Shrestha, Ximena Contla, Ewan Oglethorpe, Navid Rekabsaz

Timely and effective response to humanitarian crises requires quick and accurate analysis of large amounts of text data - a process that can highly benefit from expert-assisted NLP systems trained on validated and annotated data in the humanitarian response domain.

Humanitarian Multilabel Text Classification +2

Unlearning Protected User Attributes in Recommendations with Adversarial Training

1 code implementation9 Jun 2022 Christian Ganhör, David Penz, Navid Rekabsaz, Oleg Lesota, Markus Schedl

We conduct experiments on the MovieLens-1M and LFM-2b-DemoBias datasets, and evaluate the effectiveness of the bias mitigation method based on the inability of external attackers in revealing the users' gender information from the model.

Collaborative Filtering

Modular and On-demand Bias Mitigation with Attribute-Removal Subnetworks

1 code implementation30 May 2022 Lukas Hauzenberger, Shahed Masoudian, Deepak Kumar, Markus Schedl, Navid Rekabsaz

Societal biases are reflected in large pre-trained language models and their fine-tuned versions on downstream tasks.

Attribute Disentanglement

Do Perceived Gender Biases in Retrieval Results Affect Relevance Judgements?

no code implementations3 Mar 2022 Klara Krieg, Emilia Parada-Cabaleiro, Markus Schedl, Navid Rekabsaz

This work investigates the effect of gender-stereotypical biases in the content of retrieved results on the relevance judgement of users/annotators.

Information Retrieval Retrieval

Grep-BiasIR: A Dataset for Investigating Gender Representation-Bias in Information Retrieval Results

1 code implementation19 Jan 2022 Klara Krieg, Emilia Parada-Cabaleiro, Gertraud Medicus, Oleg Lesota, Markus Schedl, Navid Rekabsaz

To facilitate the studies of gender bias in the retrieval results of IR systems, we introduce Gender Representation-Bias for Information Retrieval (Grep-BiasIR), a novel thoroughly-audited dataset consisting of 118 bias-sensitive neutral search queries.

Information Retrieval Retrieval

Analyzing Item Popularity Bias of Music Recommender Systems: Are Different Genders Equally Affected?

no code implementations16 Aug 2021 Oleg Lesota, Alessandro B. Melchiorre, Navid Rekabsaz, Stefan Brandl, Dominik Kowald, Elisabeth Lex, Markus Schedl

In this work, in contrast, we propose to investigate popularity differences (between the user profile and recommendation list) in terms of median, a variety of statistical moments, as well as similarity measures that consider the entire popularity distributions (Kullback-Leibler divergence and Kendall's tau rank-order correlation).

Collaborative Filtering Music Recommendation +1

A Modern Perspective on Query Likelihood with Deep Generative Retrieval Models

1 code implementation25 Jun 2021 Oleg Lesota, Navid Rekabsaz, Daniel Cohen, Klaus Antonius Grasserbauer, Carsten Eickhoff, Markus Schedl

In contrast to the matching paradigm, the probabilistic nature of generative rankers readily offers a fine-grained measure of uncertainty.

Passage Re-Ranking Passage Retrieval +3

Not All Relevance Scores are Equal: Efficient Uncertainty and Calibration Modeling for Deep Retrieval Models

1 code implementation10 May 2021 Daniel Cohen, Bhaskar Mitra, Oleg Lesota, Navid Rekabsaz, Carsten Eickhoff

In any ranking system, the retrieval model outputs a single score for a document based on its belief on how relevant it is to a given search query.

Retrieval

Societal Biases in Retrieved Contents: Measurement Framework and Adversarial Mitigation for BERT Rankers

1 code implementation28 Apr 2021 Navid Rekabsaz, Simone Kopeinik, Markus Schedl

In this work, we first provide a novel framework to measure the fairness in the retrieved text contents of ranking models.

Disentanglement Fairness +5

MultiHumES: Multilingual Humanitarian Dataset for Extractive Summarization

no code implementations EACL 2021 Jenny Paola Yela-Bello, Ewan Oglethorpe, Navid Rekabsaz

To improve this process, effective summarization models are a valuable tool for humanitarian response experts as they provide digestible overviews of essential information in secondary data.

Decision Making Extractive Summarization +1

TripClick: The Log Files of a Large Health Web Search Engine

1 code implementation14 Mar 2021 Navid Rekabsaz, Oleg Lesota, Markus Schedl, Jon Brassey, Carsten Eickhoff

As such, the collection is one of the few datasets offering the necessary data richness and scale to train neural IR models with a large amount of parameters, and notably the first in the health domain.

Information Retrieval Retrieval

Do Neural Ranking Models Intensify Gender Bias?

1 code implementation1 May 2020 Navid Rekabsaz, Markus Schedl

Concerns regarding the footprint of societal biases in information retrieval (IR) systems have been raised in several previous studies.

Passage Retrieval Retrieval +1

DSR: A Collection for the Evaluation of Graded Disease-Symptom Relations

no code implementations15 Jan 2020 Markus Zlabinger, Sebastian Hofstätter, Navid Rekabsaz, Allan Hanbury

While existing disease-symptom relationship extraction methods are used as the foundation in the various medical tasks, no collection is available to systematically evaluate the performance of such methods.

Medical Diagnosis Word Embeddings

On the Effect of Low-Frequency Terms on Neural-IR Models

1 code implementation29 Apr 2019 Sebastian Hofstätter, Navid Rekabsaz, Carsten Eickhoff, Allan Hanbury

Low-frequency terms are a recurring challenge for information retrieval models, especially neural IR frameworks struggle with adequately capturing infrequently observed words.

Passage Retrieval Retrieval +1

Measuring Societal Biases from Text Corpora with Smoothed First-Order Co-occurrence

no code implementations13 Dec 2018 Navid Rekabsaz, Robert West, James Henderson, Allan Hanbury

The common approach to measuring such biases using a corpus is by calculating the similarities between the embedding vector of a word (like nurse) and the vectors of the representative words of the concepts of interest (such as genders).

Word Embeddings

Addressing Cross-Lingual Word Sense Disambiguation on Low-Density Languages: Application to Persian

no code implementations16 Nov 2017 Navid Rekabsaz, Mihai Lupu, Allan Hanbury, Andres Duque

We explore the use of unsupervised methods in Cross-Lingual Word Sense Disambiguation (CL-WSD) with the application of English to Persian.

Semantic Similarity Semantic Textual Similarity +1

Toward Incorporation of Relevant Documents in word2vec

no code implementations20 Jul 2017 Navid Rekabsaz, Bhaskar Mitra, Mihai Lupu, Allan Hanbury

As an alternative, explicit word representations propose vectors whose dimensions are easily interpretable, and recent methods show competitive performance to the dense vectors.

Information Retrieval Retrieval +1

Uncertainty in Neural Network Word Embedding: Exploration of Threshold for Similarity

no code implementations20 Jun 2016 Navid Rekabsaz, Mihai Lupu, Allan Hanbury

Word embedding, specially with its recent developments, promises a quantification of the similarity between terms.

Information Retrieval Retrieval

Standard Test Collection for English-Persian Cross-Lingual Word Sense Disambiguation

1 code implementation LREC 2016 Navid Rekabsaz, Serwah Sabetghadam, Mihai Lupu, Linda Andersson, Allan Hanbury

In this paper, we address the shortage of evaluation benchmarks on Persian (Farsi) language by creating and making available a new benchmark for English to Persian Cross Lingual Word Sense Disambiguation (CL-WSD).

Word Sense Disambiguation

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