The construct of information systems use benefits: Theoretical explication of its underlying dimensions and the development of a measurement scale

As a key construct for the IS success model (DeLone & McLean (1992, 2003), information systems benefits for individuals (ISBI) has received considerable attention from researchers over the years. However, much remains to be explored to develop and validate the underlying theoretical dimensions for this crucial construct. Further, a major weakness of the extant research in this area is that most reported studies have been conducted in the context of individual IS application instead of the overall IS in the organization. To fill these gaps in research, we will first present a theoretical conceptualization of the ISBI construct, and then develop and validate a measurement scale for the construct. Drawing from the ERG theory (Alderfer, 1972), Job Characteristic Theory (Hackman & Oldham, 1975, 1976) and other theoretical perspectives, we developed a theory-based TJW framework which consists of three levels: Task performance, Job interaction, and Work enrichment. The nomological validity of the scale was then successfully demonstrated by a partial test of the IS success model using the ISBI measure and a measure of the overall IS use. Finally, we demonstrated the diagnostic power of the construct through an exploratory research model which showed that, while task performance benefits have insignificant effect on satisfaction, both job interaction benefits and work enrichment effects have substantial effects on satisfaction. These study results have thus deepened our understanding on the underpinnings of IS usage behaviors and contributed to the cumulated research on IS success.     

企业知识整合活动对信息系统吸收的影响研究

 企业信息系统必须与其业务活动紧密结合才能获得竞争优势。那么,信息技术在组织中的内化与吸收程度就是信息系统成功、乃至提高企业竞争绩效的关键环节。本文借助企业知识理论来分析组织层面复杂信息系统吸收的驱动因素,探索并归纳涉及到组织内外部的三类跨层次、跨职能的知识整合活动以及影响它们的组织制度环境,从而构建较为完整的信息系统吸收过程模型及相关研究假设。结合问卷调查的实证方法,作者采用结构方程模型来验证理论模型,从而为企业提供更加切实的实践指导与管理建议。     

信息系统采纳后用户行为影响因素的实证研究*

基于期望证实模型以及使用理论,实证研究信息系统采纳后影响用户行为的因素。首先,将信息系统采纳后的行为分为三个阶段：接受阶段、使用阶段以及成果阶段,对三个阶段的相关研究进行总结分析,结合期望证实模型以及使用理论构建研究模型。第二,通过对问卷数据进行信效度和路径分析检验,验证影响因素间的假设,同时对影响用户继续使用意愿,三种使用行为与绩效之间的关系进行分析。研究结果显示,满意和感知有用性对继续使用意愿有显著的影响,使用路径和使用融合对绩效有显著的影响。最后对研究结果与不足进行讨论。     

游客涉入及其与旅游动机和游客满意度的结构关系——以桂林、阳朔入境旅游者为例

旅游动机、游客涉入和游客满意度通常被独立研究,对这三个变量之间因果关系的理解还很不够.研究检验了旅游动机、游客涉入和游客满意度测量量表的跨文化适用性,使用结构方程模型分析三变量之间的结构关系,研究发现:产生于西方的测量量表可以用于中国入境旅游研究;旅游动机正向影响游客涉入;游客涉入正向影响游客满意度,游客涉入对旅游动机和游客满意度之间的关系起中介作用.     

A probabilistic model of information retrieval: development and comparative experiments: Part 2

The paper combines a comprehensive account of the probabilistic model of retrieval with new systematic experiments on TREC Programme material. It presents the model from its foundations through its logical development to cover more aspects of retrieval data and a wider range of system functions. Each step in the argument is matched by comparative retrieval tests, to provide a single coherent account of a major line of research. The experiments demonstrate, for a large test collection, that the probabilistic model is effective and robust, and that it responds appropriately, with major improvements in performance, to key features of retrieval situations.Part 1 covers the foundations and the model development for document collection and relevance data, along with the test apparatus. Part 2 covers the further development and elaboration of the model, with extensive testing, and briefly considers other environment conditions and tasks, model training, concluding with comparisons with other approaches and an overall assessment.Data and results tables for both parts are given in Part 1. Key results are summarised in Part 2.