Search Results for author: Tetsuya Sakai

Found 27 papers, 7 papers with code

MIRTT: Learning Multimodal Interaction Representations from Trilinear Transformers for Visual Question Answering

1 code implementation Findings (EMNLP) 2021 Junjie Wang, Yatai Ji, Jiaqi Sun, Yujiu Yang, Tetsuya Sakai

On the other hand, trilinear models such as the CTI model efficiently utilize the inter-modality information between answers, questions, and images, while ignoring intra-modality information.

Multiple-choice Question Answering +1

Evaluating the Effects of Embedding with Speaker Identity Information in Dialogue Summarization

no code implementations LREC 2022 Yuji Naraki, Tetsuya Sakai, Yoshihiko Hayashi

Automatic dialogue summarization is a task used to succinctly summarize a dialogue transcript while correctly linking the speakers and their speech, which distinguishes this task from a conventional document summarization.

Document Summarization Informativeness +1

Decoy Effect In Search Interaction: Understanding User Behavior and Measuring System Vulnerability

no code implementations27 Mar 2024 Nuo Chen, Jiqun Liu, Hanpei Fang, Yuankai Luo, Tetsuya Sakai, Xiao-Ming Wu

This study examines the decoy effect's underexplored influence on user search interactions and methods for measuring information retrieval (IR) systems' vulnerability to this effect.

Information Retrieval Retrieval

Decoy Effect in Search Interaction: A Pilot Study

no code implementations4 Nov 2023 Nuo Chen, Jiqun Liu, Tetsuya Sakai, Xiao-Ming Wu

In recent years, the influence of cognitive effects and biases on users' thinking, behaving, and decision-making has garnered increasing attention in the field of interactive information retrieval.

Decision Making Information Retrieval +1

EALM: Introducing Multidimensional Ethical Alignment in Conversational Information Retrieval

1 code implementation2 Oct 2023 Yiyao Yu, Junjie Wang, Yuxiang Zhang, Lin Zhang, Yujiu Yang, Tetsuya Sakai

Artificial intelligence (AI) technologies should adhere to human norms to better serve our society and avoid disseminating harmful or misleading information, particularly in Conversational Information Retrieval (CIR).

Ethics Information Retrieval +1

Open-Domain Dialogue Quality Evaluation: Deriving Nugget-level Scores from Turn-level Scores

1 code implementation30 Sep 2023 Rikiya Takehi, Akihisa Watanabe, Tetsuya Sakai

Existing dialogue quality evaluation systems can return a score for a given system turn from a particular viewpoint, e. g., engagingness.

Towards Consistency Filtering-Free Unsupervised Learning for Dense Retrieval

no code implementations5 Aug 2023 Haoxiang Shi, Sumio Fujita, Tetsuya Sakai

In addition, consistency filtering often struggles to identify retrieval intentions and recognize query and corpus distributions in a target domain.

Information Retrieval Retrieval

A Meta-Evaluation of C/W/L/A Metrics: System Ranking Similarity, System Ranking Consistency and Discriminative Power

no code implementations6 Jul 2023 Nuo Chen, Tetsuya Sakai

In this study, we investigate the statistical stability of C/W/L/A metrics from the perspective of: (1) the system ranking similarity among aggregations, (2) the system ranking consistency of aggregations and (3) the discriminative power of aggregations.

Information Retrieval

SWAN: A Generic Framework for Auditing Textual Conversational Systems

no code implementations15 May 2023 Tetsuya Sakai

We present a simple and generic framework for auditing a given textual conversational system, given some samples of its conversation sessions as its input.

ONCE: Boosting Content-based Recommendation with Both Open- and Closed-source Large Language Models

2 code implementations11 May 2023 Qijiong Liu, Nuo Chen, Tetsuya Sakai, Xiao-Ming Wu

Personalized content-based recommender systems have become indispensable tools for users to navigate through the vast amount of content available on platforms like daily news websites and book recommendation services.

Navigate News Generation +3

NER-to-MRC: Named-Entity Recognition Completely Solving as Machine Reading Comprehension

no code implementations6 May 2023 Yuxiang Zhang, Junjie Wang, Xinyu Zhu, Tetsuya Sakai, Hayato Yamana

Named-entity recognition (NER) detects texts with predefined semantic labels and is an essential building block for natural language processing (NLP).

Machine Reading Comprehension named-entity-recognition +2

Relevance Assessments for Web Search Evaluation: Should We Randomise or Prioritise the Pooled Documents? (CORRECTED VERSION)

no code implementations2 Nov 2022 Tetsuya Sakai, Sijie Tao, Zhaohao Zeng

In the context of depth-$k$ pooling for constructing web search test collections, we compare two approaches to ordering pooled documents for relevance assessors: the prioritisation strategy (PRI) used widely at NTCIR, and the simple randomisation strategy (RND).

Zero-Shot Learners for Natural Language Understanding via a Unified Multiple Choice Perspective

1 code implementation16 Oct 2022 Ping Yang, Junjie Wang, Ruyi Gan, Xinyu Zhu, Lin Zhang, Ziwei Wu, Xinyu Gao, Jiaxing Zhang, Tetsuya Sakai

We propose a new paradigm for zero-shot learners that is format agnostic, i. e., it is compatible with any format and applicable to a list of language tasks, such as text classification, commonsense reasoning, coreference resolution, and sentiment analysis.

Multiple-choice Natural Language Inference +4

On Variants of Root Normalised Order-aware Divergence and a Divergence based on Kendall's Tau

no code implementations15 Apr 2022 Tetsuya Sakai

More specifically, the present study defines and evaluates, in addition to the quantification measures considered earlier, a few variants of an ordinal quantification measure called Root Normalised Order-aware Divergence (RNOD), as well as a measure which we call Divergence based on Kendall's $\tau$ (DNKT).

A Versatile Framework for Evaluating Ranked Lists in terms of Group Fairness and Relevance

no code implementations1 Apr 2022 Tetsuya Sakai, Jin Young Kim, Inho Kang

We present a simple and versatile framework for evaluating ranked lists in terms of group fairness and relevance, where the groups (i. e., possible attribute values) can be either nominal or ordinal in nature.

Attribute Fairness

AxIoU: An Axiomatically Justified Measure for Video Moment Retrieval

no code implementations CVPR 2022 Riku Togashi, Mayu Otani, Yuta Nakashima, Esa Rahtu, Janne Heikkila, Tetsuya Sakai

First, it is rank-insensitive: It ignores the rank positions of successfully localised moments in the top-$K$ ranked list by treating the list as a set.

Moment Retrieval Retrieval

Evaluating Evaluation Measures for Ordinal Classification and Ordinal Quantification

no code implementations ACL 2021 Tetsuya Sakai

Ordinal Quantification (OQ) is a related task where the gold data is a distribution over ordinal classes, and the system is required to estimate this distribution.

Classification Ordinal Classification +1

Scalable Personalised Item Ranking through Parametric Density Estimation

no code implementations11 May 2021 Riku Togashi, Masahiro Kato, Mayu Otani, Tetsuya Sakai, Shin'ichi Satoh

However, such methods have two main drawbacks particularly in large-scale applications; (1) the pairwise approach is severely inefficient due to the quadratic computational cost; and (2) even recent model-based samplers (e. g. IRGAN) cannot achieve practical efficiency due to the training of an extra model.

Density Estimation Learning-To-Rank

DCH-2: A Parallel Customer-Helpdesk Dialogue Corpus with Distributions of Annotators' Labels

no code implementations18 Apr 2021 Zhaohao Zeng, Tetsuya Sakai

We introduce a data set called DCH-2, which contains 4, 390 real customer-helpdesk dialogues in Chinese and their English translations.

Dialogue Evaluation Machine Translation +3

A Siamese CNN Architecture for Learning Chinese Sentence Similarity

no code implementations Asian Chapter of the Association for Computational Linguistics 2020 Haoxiang Shi, Cen Wang, Tetsuya Sakai

This paper presents a deep neural architecture which applies the siamese convolutional neural network sharing model parameters for learning a semantic similarity metric between two sentences.

Semantic Similarity Semantic Textual Similarity +2

How to Measure the Reproducibility of System-oriented IR Experiments

1 code implementation26 Oct 2020 Timo Breuer, Nicola Ferro, Norbert Fuhr, Maria Maistro, Tetsuya Sakai, Philipp Schaer, Ian Soboroff

Replicability and reproducibility of experimental results are primary concerns in all the areas of science and IR is not an exception.

RSL19BD at DBDC4: Ensemble of Decision Tree-based and LSTM-based Models

no code implementations6 May 2019 Chih-Hao Wang, Sosuke Kato, Tetsuya Sakai

RSL19BD (Waseda University Sakai Laboratory) participated in the Fourth Dialogue Breakdown Detection Challenge (DBDC4) and submitted five runs to both English and Japanese subtasks.

Graded Relevance Assessments and Graded Relevance Measures of NTCIR: A Survey of the First Twenty Years

no code implementations27 Mar 2019 Tetsuya Sakai

NTCIR was the first large-scale IR evaluation conference to construct test collections with graded relevance assessments: the NTCIR-1 test collections from 1998 already featured relevant and partially relevant documents.

Retrieval

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