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Timing of Aspect Suggestion to Encourage Diverse Information Acquisition in Spoken Conversational Search

Published: 08 December 2024 Publication History

Abstract

Spoken conversational search is a type of search where no screens are available and the interactions between users and systems are entirely voice-based. To obtain diverse information in spoken conversational search, it is essential for the system to suggest what should be searched for next. We refer to such a suggestion as an aspect suggestion. In this work, we focus on the timing of when the system should provide aspect suggestions and investigate whether the timing of the suggestion affects the participants' querying behavior. We conducted a user study (N=27) using the Wizard of Oz method, in which we compared three systems: (1) a system without aspect suggestion (no aspect suggestion), (2) a system that provides an aspect suggestion immediately after answering the participant's query (immediate aspect suggestion), and (3) a system that provides an aspect suggestion when the user is facing difficulty in formulating a new query (delayed aspect suggestion). The results of the study revealed that aspect suggestions enabled the participants to obtain more diverse information. Additionally, we observed that the delayed aspect suggestion facilitated the participants to formulate queries more spontaneously compared with the immediate aspect suggestion. Interview results indicated a participant preference for immediate aspect suggestion when lacking domain knowledge or query ideas.

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    cover image ACM Conferences
    SIGIR-AP 2024: Proceedings of the 2024 Annual International ACM SIGIR Conference on Research and Development in Information Retrieval in the Asia Pacific Region
    December 2024
    328 pages
    ISBN:9798400707247
    DOI:10.1145/3673791
    This work is licensed under a Creative Commons Attribution International 4.0 License.

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    Published: 08 December 2024

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    Author Tags

    1. exploratory search
    2. query suggestion
    3. spoken conversational search

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