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Kar Yan Tam

dblp:02/2801 · DBLP profile ↗
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22ranked-venue papers
4as first author
1since 2021 · last 2025
0000-0003-3242-0184ORCID · corroborated

Domains — the database's venue-derived domains; a paper can count in several

Artificial intelligence and machine learning · 11 · 2 first-author · 1 since 2021Databases, data management, data science and information retrieval · 6 · 2 first-authorHuman-computer interaction and ubiquitous computing · 5

Expertise — from the expertise taxonomy: the topics of the expert's papers under the CCF categories. A weight counts papers with recency: 1 for a paper about the topic, 0.3 when the topic is its context, halved every five years.

Artificial intelligence
1 paper
Trustworthy machine learning · 77% Language models and text generation · 23%
Human-computer interaction and pervasive computing
3 papers
Usability and user experience research · 58% User interface design and tools · 36% Learning and educational technologies · 6%

Topics — the 5 heaviest of 7, each with the papers that count most for it

TopicWeightPapersLastEvidence papers
Natural language and speech › Language models and text generation › LLM agents
LLM decision-making
0.312025
Evaluating and Aligning Human Economic Risk Preferences in LLMs · EMNLP 2025
User interface design and tools › web site design › web interface design
e-commerce interface design
0.012004
Designing product listing pages on e-commerce websites: an examination of presentation mode and information format · Int. J. Hum. Comput. Stud. 2004
Usability and user experience research
technology acceptance
0.012002
Understanding user acceptance of digital libraries: what are the roles of interface characteristics, organizational context, and individual differences? · Int. J. Hum. Comput. Stud. 2002
User interface design and tools
information presentation
0.012004
Designing product listing pages on e-commerce websites: an examination of presentation mode and information format · Int. J. Hum. Comput. Stud. 2004
Learning and educational technologies
digital libraries
0.012002
Understanding user acceptance of digital libraries: what are the roles of interface characteristics, organizational context, and individual differences? · Int. J. Hum. Comput. Stud. 2002

Methods — techniques the papers use, named apart from their topics

in-context learning · 0.9direct preference optimization · 0.9
YearPublicationVenuePosition
2025 Evaluating and Aligning Human Economic Risk Preferences in LLMs
abstract
Large Language Models (LLMs) are increasingly used in decision-making scenarios that involve risk assessment, yet their alignment with human economic rationality remains unclear.In this study, we investigate whether LLMs exhibit risk preferences consistent with human expectations across different personas.Specifically, we propose an evaluation metric called Risk Disparity Score (RDS) and assess whether LLM-generated responses reflect appropriate levels of risk aversion or riskseeking behavior based on individual's persona.Our results reveal that while LLMs make reasonable decisions in simplified, personalized risk contexts, their performance declines in more complex economic decision-making tasks.To address this, we test whether current state-of-art alignment methods such as Direct Preference Optimization(DPO) and In Context Learning(ICL) can enhance LLM adherence to persona-specific risk preferences.We find DPO can improve the economic rationality of LLMs in loss-related parameters, offering a step toward more human-aligned AI decision-making.
Yixuan Tang 0001, Yi Yang 0042, Kar Yan Tam
EMNLP4
2012 Sell by bundle or unit?: Pure bundling versus mixed bundling of information goods
Wendy Hui, Byungjoon Yoo, Vidyanand Choudhary, Kar Yan Tam
Decis. Support Syst.4
2009 Determinants of service quality and continuance intention of online services: The case of eTax
abstract
Abstract This article examines the determinants of service quality and continuance intention of online services. We proposed and empirically tested a model with both service and technology characteristics as the main drivers of service quality and subsequent continuance intention of eTax, an electronic government (eGovernment) service that enables citizens to file their taxes online. Our data were collected via a two‐stage longitudinal online survey of 518 participants before and after they made use of the eTax service in Hong Kong. The results showed that both service characteristics (i.e., security and convenience) and one of the technology characteristics (i.e., perceived usefulness, but not perceived ease of use) were the key determinants of service quality. Another interesting and important finding that runs counter to the vast body of empirical evidence on predicting intention is that perceived usefulness was not the strongest predictor of continuance intention but rather service quality was. To provide a richer picture of these relationships, we also conducted a post‐hoc analysis of the effects of service and technology characteristics on the individual dimensions of service quality and their subsequent impact on continuance intention and found assurance and reliability to be the only significant predictors of continuance intention. We present implications for research and practice related to online services.
Paul Jen-Hwa Hu, Susan A. Brown, James Y. L. Thong, Frank K. Y. Chan, Kar Yan Tam
J. Assoc. Inf. Sci. Technol.5
2008 Economics of shareware: How do uncertainty and piracy affect shareware quality and brand premium?
Wendy Hui, Byungjoon Yoo, Kar Yan Tam
Decis. Support Syst.3
2008 Risk of using pirated software and its impact on software protection strategies
Samuel Shu Kin Kwan, Jeevan Jaisingh, Kar Yan Tam
Decis. Support Syst.3
2007 How do Web users respond to non-banner-ads animation? The effects of task type and user experience
abstract
Abstract Prior research on Web animation typically focuses on banner ads, where the findings suggest that users are capable of ignoring the animation when performing online tasks. Research on non‐banner‐ads animation (e.g., animation applied to the main content of an e‐commerce Web site), however, is relatively scarce with inconclusive results. We propose that the effects of non‐banner‐ads animation are moderated by task type and the Web user's experience with the animation. Drawing upon divided attention theories, especially the central capacity theory, this research investigates the effects of non‐banner‐ads animation on Web users' clicking behavior, task performance, and perceptions through an online shopping experiment. The results show that non‐banner‐ads animation does attract Web users' attention, with the animated item more likely to be clicked first and also more likely to be purchased when users are performing browsing tasks. Meanwhile, Web users' task performance and perceptions are negatively affected in the presence of animation. Moreover, the negative effects of animation on task performance are greater in browsing tasks than in searching tasks. Finally, experience can help Web users to reduce the distraction from animation and is more effective when users are engaged in searching tasks than when they are engaged in browsing tasks.
Weiyin Hong, James Y. L. Thong, Kar Yan Tam
J. Assoc. Inf. Sci. Technol.3
2007 The Effect of Culture and Product Categories on the Level of Use of Buy-It-Now (BIN) Auctions by Sellers
abstract
While previous studies on buy-it-now (BIN) auctions focus on the impact of BIN format on economic performances, our study focuses on factors that affect the level of use of BIN auctions by sellers. We propose a conceptual model where culture and product categories are two important factors on the level of use of BIN auctions. Our empirical investigation shows that the level of use of BIN auctions can be explained by the Hofstede Cultural Dimensions. While power distance brings a positive impact, uncertainty avoidance and individualism bring negative impacts on the level of use of BIN auctions by sellers of different countries. Our result also shows that the level of use of BIN auctions by sellers increases with the ease of judging product quality. Our results provide valuable insights for marketplace operators to refine their business strategies and market mechanisms for expanding their businesses to overseas markets.
Kevin K. W. Ho 0001, Byungjoon Yoo, Seunghee Yu, Kar Yan Tam
J. Glob. Inf. Manag.4
2007 Technology-Assisted Learning and Learning Style: A Longitudinal Field Experiment
abstract
From a student's perspective, technology-assisted learning provides convenient access to interactive contents in a hyperlinked multimedia environment that allows increased control over the pace and timing of the presented material. Previous research examining different aspects of technology-assisted learning has found equivocal results concerning its effectiveness and outcomes. We extend prior studies by conducting a longitudinal field experiment to compare technology-assisted with face-to-face learning for students' learning of English. Our comparative investigation focuses on learning effectiveness, perceived course learnability, learning-community support, and learning satisfaction. In addition, we analyze the effects of different learning styles in moderating the effectiveness of and satisfaction with technology-assisted learning. Overall, our results show significantly greater learning effectiveness with technology-assisted learning than with conventional face-to-face learning. Learning style has noticeable influences on the effectiveness and outcomes of technology-assisted learning. We also observe an apparently important interaction effect with the medium for delivery, which may partially explain the equivocal results of previous research.
Paul Jen-Hwa Hu, Wendy Hui, Theodore H. Clark, Kar Yan Tam
IEEE Trans. Syst. Man Cybern. Part A4
2006 Understanding continued information technology usage behavior: A comparison of three models in the context of mobile internet
Se-Joon Hong, James Y. L. Thong, Kar Yan Tam
Decis. Support Syst.3
2006 The effects of post-adoption beliefs on the expectation-confirmation model for information technology continuance
James Y. L. Thong, Se-Joon Hong, Kar Yan Tam
Int. J. Hum. Comput. Stud.3
2005 An Empirical Examination of the Effects of Web Personalization at Different Stages of Decision Making
abstract
Personalization agents are incorporated in many Web sites to tailor content and interfaces for individual users. In contrast to the proliferation of personalized Web services worldwide, empirical research on the effects of Web personalization is scant. How does exposure to personalized offers affect subsequent product consideration and choice outcome? Drawing on literature in human-computer interaction (HCI) and user behavior, this research examines the effect of three major elements of Web personalization strategies on users' information processing through different decision-making stages: personalized content quality, feature overlapping among alternatives, and personalized message framing. These elements can be manipulated by a firm during implemention of its personalization strategy. A study using a personalized ringtone download Web site was conducted. The findings provide empirical evidence of the effects of Web personalization. In particular, when users are forming their consideration sets, the agents can play a role in helping users discover new products or generate demand for unfamiliar products. Once a decision has been made, however, the personalization agent's persuasive effects diminish. These results establish that the role of personalization agents changes at different stages of users' decision-making process.
Shuk Ying Ho, Kar Yan Tam
Int. J. Hum. Comput. Interact.2
2004 SDMI-based rights management systems
Sai Ho Kwok, Christopher C. Yang, Kar Yan Tam, Jason S. W. Wong
Decis. Support Syst.3
2004 Designing product listing pages on e-commerce websites: an examination of presentation mode and information format
Weiyin Hong, James Y. L. Thong, Kar Yan Tam
Int. J. Hum. Comput. Stud.3
2003 Integration of digital rights management into the Internet Open Trading Protocol
Sai Ho Kwok, Shing-Chi Cheung, K. C. Wong 0004, K. F. Tsang, Siu Man Lui, Kar Yan Tam
Decis. Support Syst.6
2002 Understanding user acceptance of digital libraries: what are the roles of interface characteristics, organizational context, and individual differences?
James Y. L. Thong, Weiyin Hong, Kar Yan Tam
Int. J. Hum. Comput. Stud.3
2001 Decision-making and e-commerce systems
James Y. L. Thong, Patrick Y. K. Chau, Kar Yan Tam
Decis. Support Syst.3
2000 Organizational adoption of open systems: a 'technology-push, need-pull' perspective
Patrick Y. K. Chau, Kar Yan Tam
Inf. Manag.2
1995 Self-organizing map network as an interactive clustering tool - An application to group technology
Melody Y. Kiang, Uday R. Kulkarni, Kar Yan Tam
Decis. Support Syst.3
1994 Neural networks for decision support
Kar Yan Tam
Decis. Support Syst.1
1993 Applying conceptual clustering to knowledge-bases construction
Kar Yan Tam
Decis. Support Syst.1
1992 Capital budgeting in information systems development
Kar Yan Tam
Inf. Manag.1
1989 Information systems for security trading
Kar Yan Tam
Inf. Manag.1