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Featured researches published by Yulia Wati.


International Journal of Information Management | 2011

Examination of how social aspects moderate the relationship between task characteristics and usage of social communication technologies (SCTs) in organizations

Chulmo Koo; Yulia Wati; Jason J. Jung

Because of the increasing significance of social communication technologies within an organization, they have become a new form of information processing, resulting in business process transitions and increased benefits. By applying media richness theory and social theories, this study investigated how social communication technologies (SCTs) can be used by an employee to fit his/her task characteristics. Additionally, it also examined how the employees social relationships moderated media usage in the current job environment and how this usage influenced the task performance. Five media were selected in this study (telephone, video conferencing, email, instant messaging, and blog). Using a hierarchical regression approach, we found that task characteristics were related to media usage, whereas social factors (social influence and social affinity) moderated the degree of the relationships. A few particular media and technologies seemed to perform well, however these are influenced by the social aspects. Moreover, the usage of social technologies results in positive task performance. The performance of a few specific technologies demonstrated binding effects (email performance was associated with instant messenger performance). In summary, we found that the usage of SCTs is instrumentally determined by the interaction between the task and social relationships.


Journal of Medical Internet Research | 2011

Website Quality, Expectation, Confirmation, and End User Satisfaction: The Knowledge-Intensive Website of the Korean National Cancer Information Center

Chulmo Koo; Yulia Wati; Keeho Park; Min Kyung Lim

Background The fact that patient satisfaction with primary care clinical practices and physician-patient communications has decreased gradually has brought a new opportunity to the online channel as a supplementary service to provide additional information. Objective In this study, our objectives were to examine the process of cognitive knowledge expectation-confirmation from eHealth users and to recommend the attributes of a “knowledge-intensive website.”. Knowledge expectation can be defined as users’ existing attitudes or beliefs regarding expected levels of knowledge they may gain by accessing the website. Knowledge confirmation is the extent to which user’s knowledge expectation of information systems use is realized during actual use. In our hypothesized research model, perceived information quality, presentation and attractiveness as well as knowledge expectation influence knowledge confirmation, which in turn influences perceived usefulness and end user satisfaction, which feeds back to knowledge expectation. Methods An empirical study was conducted at the National Cancer Center (NCC), Republic of Korea (South Korea), by evaluating its official website. A user survey was administered containing items to measure subjectively perceived website quality and expectation-confirmation attributes. A study sample of 198 usable responses was used for further analysis. We used the structural equation model to test the proposed research model. Results Knowledge expectation exhibited a positive effect on knowledge confirmation (beta = .27, P < .001). The paths from information quality, information presentation, and website attractiveness to knowledge confirmation were also positive and significant (beta = .24, P < .001; beta = .29, P < .001; beta = .18, P < .001, respectively). Moreover, the effect of knowledge confirmation on perceived usefulness was also positively significant (beta = .64, P < .001). Knowledge expectation together with knowledge confirmation and perceived usefulness also significantly affected end user satisfaction (beta = .22 P < .001; beta = .39, P < .001; beta = .25, P < .001, respectively). Conclusions Theoretically, this study has (1) identified knowledge-intensive website attributes, (2) enhanced the theoretical foundation of eHealth from the information systems (IS) perspective by adopting the expectation-confirmation theory (ECT), and (3) examined the importance of information and knowledge attributes and explained their impact on user satisfaction. Practically, our empirical results suggest that perceived website quality (ie, information quality, information presentation, and website attractiveness) is a core requirement for knowledge building. In addition, our study has also shown that knowledge confirmation has a greater effect on satisfaction than both knowledge expectation and perceived usefulness.


hawaii international conference on system sciences | 2012

Toward Green IS Adoption Behaviors: A Self-Determination Perspective

Yulia Wati; Chulmo Koo

The objectives of this study were to examine the predictors of green technology adoption behavior and to establish its foundation from motivational perspective. We adopted Self-Determination Theory to develop our Green IS adoption model. The proposed research model was tested by partial least squares. The study provided some key findings. First, eco-technological knowledge had a positive and significant effect on intrinsic motivation (i.e. perceived pleasurability), integrated (i.e. perceived altruism), identified (i.e. perceived importance), and introjected regulation (ego-involvement). Second, intrinsic motivation (i.e. perceived pleasurability) had a positive effect on integrated (i.e. perceived altruism and perceived usefulness), identified (i.e. perceived importance), and introjected regulation (ego-involvement). Moreover, identified (i.e. perceived importance) and integrated regulation (i.e. perceived usefulness) had positive effects on attitude toward Green IS use behavior. Furthermore, attitude toward Green IS use behavior was the main predictor of Green IS use intention. Surprisingly, the results showed that there was no direct relationship between Green IS behavior intention and actual Green IS use, whereas there was a positive relationship between facilitating conditions and actual Green IS use.


asian conference on intelligent information and database systems | 2011

What Factors Do Really Influence the Level of Technostress in Organizations?: An Empirical Study

Chulmo Koo; Yulia Wati

Technostress is important fallout of the inevitable use of ICTs in organizations and illustrates the bivalent nature of their organization influence. In this research, we studied the influence of innovation culture, self-efficacy, and task complexity on technostress. In addition, we examined moderating effect of literacy facilitation in influencing the relationship between task complexity and technostress. The data for this research were collected from 98 employees of Korean companies. The results indicated that innovation culture influenced technostress negatively while task complexity had positive effect on technostress. However, we found an insignificant relationship between self-efficacy and technostress. The result also showed a negative moderating effect of literacy facilitation in influencing the relationship between task complexity and technostress. Additional discussion and implications of the empirical findings are discussed in this paper.


hawaii international conference on system sciences | 2011

E-Healthcare Service: An Investigation of the Antecedents, Moderating Roles, and Consequences

Chulmo Koo; Yulia Wati

The rapid growth of internet usage for acquiring health information has received a great deal of attention. Thus, by empirically investigating the official website of National Cancer Center of South Korea, this study adopted the concept of Elaboration Likelihood Model to examine the integration effects of website quality and perceived credibility on user satisfaction and the intention to use under an e-healthcare context. We also measured the moderating roles of self-efficacy and active control, and their consequences on both user satisfaction and intention to use. The research model was tested using Partial Least Square. The empirical results showed that both, website quality and perceived credibility, influence user satisfaction. Moreover, these three variables jointly influence intention to use. Related to the interaction effects, the results showed mixed supporting factors. In sum, our study showed that the proposed antecedents, incorporated with the moderating variables, affect the user satisfaction and intention to use.


agent and multi agent systems technologies and applications | 2009

Communities of Practice and Its Effects on Firm Performance: A Process-Oriented Study

Chulmo Koo; Sung-Yul Ryoo; Yulia Wati; Woojong Suh

The growth of interests in communities of practice is a sign of a paradigm shift in knowledge management. This paper intends to integrate the motivational factors influencing participation in communities of practice and its impacts on firm performance. We identify three determinants affecting participation in communities of practice, and argue that it leads to knowledge exchange, operational performance, and firm performance. The data required for this field study was collected from 122 firms headquartered in Korea. Additional theoretical and practical implications of these findings are also discussed in the paper.


Cyberpsychology, Behavior, and Social Networking | 2011

Internet-Addicted Kids and South Korean Government Efforts: Boot-Camp Case

Chulmo Koo; Yulia Wati; Choong C. Lee; Hea Young Oh


hawaii international conference on system sciences | 2010

The Green IT Practices of Nokia, Samsung, Sony, and Sony Ericsson: Content Analysis Approach

Yulia Wati; Chulmo Koo


Journal of Universal Computer Science | 2010

Toward an Understanding of the Mediating Role of "Trust" in Mobile Banking Service: An Empirical Test of Indonesia Case

Chulmo Koo; Yulia Wati


hawaii international conference on system sciences | 2011

An Introduction to the Green IT Balanced Scorecard as a Strategic IT Management System

Yulia Wati; Chulmo Koo

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Min Kyung Lim

Seoul National University

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Keeho Park

Centers for Disease Control and Prevention

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