A reliability generalization study (a meta-analysis of reliability coefficients) was conducted on three widely studied information systems constructs from the technology acceptance model (TAM): perceived ease of use, perceived usefulness, and behavioral intentions. This form of meta-analysis summarizes the reliability coefficients of the scores on a specified scale across studies and identifies the study characteristics that influence the reliability of these scores. Reliability is a critical issue in conducting empirical research as the reliability of the scores on well-established scales can vary with study characteristics, attenuating effect sizes. In conducting this study, an extensive literature search was conducted, with 380 articles reviewed and coded to perform reliability generalization. Study characteristics, including technology, sample, and measurement characteristics, for these articles were recorded along with effect size data for the relationships among these variables. After controlling for number of items, sample size, and sampling error, differences in reliability coefficients were found with several study characteristics for the three technology acceptance constructs. The reliability coefficients of PEOU and PU were lower in hedonic contexts than in utilitarian contexts, and were higher when the originally validated scales were used as compared to when other items were substituted. Only 27 percent of the studies that provided the measurement items used the original PEOU items, while 39 percent used the original PU items. Scales that were administered in English had higher reliability coefficients for PU and BI, with a marginal effect for PEOU. Reliability differences were also found for other study characteristics, including reliability type, subject experience, and gender composition. While average reliability coefficients were high, the results show that, on average, relationships among these constructs are attenuated by 12 percent with maximum attenuation in the range of 35 to 43 percent. Implications for technology acceptance research are discussed and suggestions for addressing variation in reliability coefficients across studies are provided.
As one of the most commonly experienced problems on the Internet, download delay is a significant impediment to the success of e-commerce websites. While some research has examined how such delays can be reduced and how much delay online users will tolerate, little research has taken a theoretically grounded approach to managing perceptions of the wait. Based on time perception theories, we develop a research model of the effects of actual wait time, amount of information, and direction of attention on perceptions of the wait. Two empirical studies were conducted using an experimental travel website to test the proposed hypotheses. The results show that with shorter waits, providing additional visual content, such as a travel picture, may make the wait feel longer. However, with longer waits, additional visual content that distracts the user from the passage of time makes the wait feel shorter and reduces users' negative affect toward the wait. Further, the benefits of providing visual content in longer waits are enhanced as more content is provided. Visual content should also be chosen to distract the user from time and temporal processing, as reminding users of the passage of time can encourage temporal processing and make the wait feel longer, especially in longer waits or when the amount of temporal visual content is high. Our findings extend time perception theories and contribute to the literature by identifying a potential paradigm shift, from the retrospective to the prospective paradigm, when waiting times are prolonged. Post hoc study results confirm the practical contribution of our research, demonstrating that several key findings are counter-intuitive to professional web designers.
The article presents marketing management research on the impact of Web site design influences consumer behavior in electronic commerce. Signalling theory is employed to consider if the perception of Web site quality by consumers influences their perceptions of product quality and their purchasing decisions in electronic commerce. Web site quality perceptions were found to have a significant correlation to product quality perception and purchasing decisions, and a greater influence on perceived product quality when consumers had higher information asymmetries.
This research explores how multimedia vividness and the use of computer-based social cues can influence involvement with technology and decision-making outcomes. An experiment is conducted that examines the effect that increased levels of vividness (text, voice, and animation) and decision aid personality have on decision-making involvement. In addition, the influence of two individual differences, gender and computer playfulness, on decision aid involvement are investigated. The cost-benefit framework of decision making and related research on consumer information processing provide the theoretical foundation for the study and suggest how increased involvement may influence decision making. Several decision-making outcomes are measured, including decision effort, decision quality, satisfaction with the decision aid, and understanding of the decision aid. Findings indicate that personality similarity (between the user and the decision aid) and computer playfulness result in increased involvement with the decision aid. In addition, women report higher levels of involvement with the decision aid. Increased levels of multimedia vividness are found to have a contradictory effect, with animation actually reducing involvement with the decision aid. The findings are discussed in terms of theoretical contributions and practical interface design implications.