视频检索相关性判断的影响因素:基于PLS路径分析的实证研究  

Factors Influencing Relevance Judgment in Video Retrieval:An Empirical Study Based on PLS Path Analysis

作　　者：王志红[1] 曹树金[1] Wang Zhihong;Cao Shujin(School of Information Management,Sun Yat-sen University,Guangzhou 510006)

机构地区：[1]中山大学资讯管理学院,广州510006

出　　处：《情报学报》2020年第9期926-937,共12页Journal of the China Society for Scientific and Technical Information

基　　金：国家社会科学基金重大项目“基于特定领域的网络资源知识组织与导航机制研究”(12&ZD222)。

摘　　要：相关性判断是用户视频检索与查寻中的关键一环,调查视频检索情境下相关性判断的影响因素,对视频检索系统的设计与开发具有重要意义。以现有理论为基础,结合视频检索的特性,本文构建了影响视频检索相关性判断的因素模型,利用实验与问卷相结合的方式收集数据,并采用PLS路径分析方法进行了数据分析和模型检验。结果显示,测量模型满足信度和效度检验;结构模型表明,主题性、范围和权威性依次是影响视频检索中相关性判断的显著因素,而可理解性、可获取性和视频特性均未发现具有统计学上的显著影响。同时,范围对主题性也具有显著影响,并通过主题性对相关性产生间接影响。此外,调节变量分析发现,性别、信息搜索能力和主题熟悉度会显著调节部分影响因素对相关性的影响。研究表明,相关性判断影响因素在不同情境以及不同类型信息之间具有一定的稳定性,同时也具有一定的差异性。本研究建议,除了主题性之外,视频信息检索系统的设计应该考虑到其他因素的影响,从而帮助用户快速有效地查找和获取所需的视频。Relevance evaluation is a key aspect of video information seeking retrieval. Thus, to design and develop a better support system, it is crucial to investigate the factors influencing humans relevance judgment in video retrieval. Based on existing theories, this paper constructed a multiple-factor model of relevance judgment in video retrieval. Subsequently,structured data were collected from 56 subjects who completed three simulated tasks and answered pre-task and post-task questionnaires. PLS path analysis was used to analyze the collected data and test the model. The results showed that the measurement model had confirmed reliability and validity. The structural model test revealed that topicality, scope, and authority, respectively, were significant factors, whereas understandability, availability, and video characteristics were found to have no statistically significant impact on relevance judgment in video retrieval. Scope also had a significant influence on topicality, thus influencing relevance judgment indirectly. Group analysis indicated that moderating factors including gender, information search ability, and topic familiarity adjusted the impact of the other influencing factors on relevance judgment. This study demonstrates that the factors influencing relevance judgment have some stability and commonality across different contexts and types of information. These results suggest that video system design and development should consider factors beyond topicality to help users effectively and efficiently access video.

关 键 词：视频信息查寻 相关性判断 情景相关性 主题性 PLS路径分析 

分 类 号：TP393.092[自动化与计算机技术—计算机应用技术]