Perceived Usefulness, Perceived Ease of Use, and User

Valid measurement scales for predicting user acceptance of computers are in short supply. Most subjective measures used in practice are unvalidated, and their relationship to system usage is unknown. The present research develops and validates new scales for two specific variables, perceived usefulness and perceived ease of use, which are hypothesized to be fundamental determinants of user acceptance. Definitions of these two variables were used to develop scale items that were pretested for content validity and then tested for reliability and construct validity in two studies involving a total of 152 users and four application programs. The measures were refined and streamlined, resulting in two six-item scales with reliabilities of .98 for usefulness and .94 for ease of use. The scales exhibited hgih convergent, discriminant, and factorial validity. Perceived usefulness was significnatly correlated with both self-reported current usage r = .63, Study 1) and self-predicted future usage r = .85, Study 2). Perceived ease of use was also significantly correlated with current usage r = .45, Study 1) and future usage r = .59, Study 2). In both studies, usefulness had a signficnatly greater correaltion with usage behavior than did ease of use. Regression analyses suggest that perceived ease of use may actually be a causal antecdent to perceived usefulness, as opposed to a parallel, direct determinant of system usage. Implications are drawn for future research on user acceptance.

Perceived usefulness, perceived ease of use, and user acceptance of information technology

Two paradigms characterize much of the research in the Information Systems discipline: behavioral science and design science The behavioral-science paradigm seeks to develop and verify theories that explain or predict human or organizational behavior The design-science paradigm seeks to extend the boundaries of human and organizational capabilities by creating new and innovative artifacts Both paradigms are foundational to the IS discipline, positioned as it is at the confluence of people, organizations, and technology Our objective is to describe the performance of design-science research in Information Systems via a concise conceptual framework and clear guidelines for understanding, executing, and evaluating the research In the design-science paradigm, knowledge and understanding of a problem domain and its solution are achieved in the building and application of the designed artifact Three recent exemplars in the research literature are used to demonstrate the application of these guidelines We conclude with an analysis of the challenges of performing high-quality design-science research in the context of the broader IS community

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Design science in information systems research

The present historical moment may seem a particularly inopportune time to review Bowling Alone, Robert Putnam's latest exploration of civic decline in America. After all, the outpouring of volunteerism, solidarity, patriotism, and self-sacrifice displayed by Americans in the wake of the September 11 terrorist attacks appears to fly in the face of Putnam's central argument: that \"social capital\" -defined as \"social networks and the norms of reciprocity and trustworthiness that arise from them\" (p. 19)'has declined to dangerously low levels in America over the last three decades. However, Putnam is not fazed in the least by the recent effusion of solidarity. Quite the contrary, he sees in it the potential to \"reverse what has been a 30to 40-year steady decline in most measures of connectedness or community.\"' As an example of how the current \"war on terrorism\" could generate a durable civic renewal, Putnam points to the burst in civic practices that occurred during and after World War II, which he says \"permanently marked\" the generation that lived through it and had a \"terrific effect on American public life over the last half-century.\" 3 If Americans can follow this example and channel their current civic

Bowling alone: The collapse and revival of American community

While computer-mediated communication use and research are proliferating rapidly, findings offer contrasting images regarding the interpersonal character of this technology. Research trends over the history of these media are reviewed with observations across trends suggested so as to provide integrative principles with which to apply media to different circumstances. First, the notion that the media reduce personal influences—their impersonal effects—is reviewed. Newer theories and research are noted explaining normative “interpersonal” uses of the media. From this vantage point, recognizing that impersonal communication is sometimes advantageous, strategies for the intentional depersonalization of media use are inferred, with implications for Group Decision Support Systems effects. Additionally, recognizing that media sometimes facilitate communication that surpasses normal interpersonal levels, a new perspective on “hyperpersonal” communication is introduced. Subprocesses are discussed pertaining to re...

Computer-Mediated Communication Impersonal, Interpersonal, and Hyperpersonal Interaction

Technical developments in electronic communication, computing, and decision support, coupled with new interest on the part of organizations to improve meeting effectiveness, are spurring research in the area of group decision support systems GDSS. A GDSS combines communication, computing, and decision support technologies to facilitate formulation and solution of unstructured problems by a group of people. This paper presents a conceptual overview of GDSS based on an information-exchange perspective of decision making, Three levels of systems are described, representing varying degrees of intervention into the decision process. Research on GDSS is conceived as evolving over time from the study of simple "shell" systems, consisting of menus of features available for selection by a group, to consideration of sophisticated rule-based systems that enable a group to pursue highly structured and novel decision paths. A multi-dimensional taxonomy of systems is proposed as an organizing framework for research in the area. Three environmental contingencies are identified as critical to GDSS design: group size, member proximity, and the task confronting the group. Potential impacts of GDSS on group processes and outcomes are discussed, and important constructs in need of study are identified.

A foundation for the study of group decision support systems

Two concurrent experiments were conducted with groups of varying size; there were 2-, 4-, and 6-person groups in one and 6- and 12-person groups in the other We compared the number and quality of 

Electronic brainstorming and group size

Changes in the knowledge and skill requirements of information systems (IS) positions were examined by analyzing the content of advertisements for IS professionals placed in four major newspapers over the 20-year period 1970-1990 Three types of jobs were examined: programmers, systems analysts, and IS managers The analysis of the frequency of phrases in these advertisements suggests that job ads for programmers have changed very little -- technical requirements remain high, and business and systems knowledge requirements remain relatively low (although the frequency of mention of business requirements has increased somewhat) IS management positions are also relatively stable (as relected in the makeup of job ads) from the standpoint that business knowledge requirements have remained high, with technical and systems requirements specified less frequently The greatest transition in specified job requirements over this 20-year period has occurred for systems analysts Although this is perhaps not surprising, the nature of this transition is Contrary to expectations, the relative frequency and proportion of stated technical knowledge requirements in ads have increased dramatically, while the relative frequency of business and systems knowledge requirements has actually decreased slightlyThese results raise questions concerning the implicit understanding by academics and practioners alike of the need for business knowledge on the part of systems analysts and other IS professionals Various interpretations of these findings are provided, and the implications for both education and recruitment are discussed

The evolution of IS job skills: a content analysis of IS job advertisements from 1970 to 1990

There is very little empirical research available on the effectiveness of decision support systems applied to decision-making groups operating in face-to-face meetings. In order to expand research in this area, a laboratory study was undertaken to examine the effects of group decision support systems (GDSS) technology on group decision quality and individual perceptions within a problem-finding context. A crisis management task served as the decision-making context. Two versions of the experimental task, one higher in difficulty and the other lower in difficulty, were administered to GDSS-supported and non-supported groups, yielding a 2 x 2 factorial design. Decision quality was significantly better in those groups that received GDSS support. The GDSS was particularly helpful in in the groups receiving the task of higher difficulty. Members' decision confidence and satisfaction with the decision process were, however, lower in the GDSS-supported groups than in the nonsupported groups. These findings expand knowledge of the applicability of GDSS for decision-making tasks and suggest that dissatisfaction maybe a stumbling block in user acceptance of these systems.

Computer-based support for group problem-finding: an exprimental investigation

Electronic brainstorming (EBS) has been proposed as a superior approach to both nominal brainstorming (working alone) and face-to-face brainstorming (verbal). However, existing empirical evidence regarding EBS's superiority over nominal brainstorming is weak. Through a comprehensive examination of the process gains and process losses inherent to different brainstorming approaches, this paper explains past results. The paper also suggests that the process gain versus process loss advantages of EBS technologies may not be large enough to enable EBS groups to outperform nominal groups. In an effort to find alternate ways of using EBS more productively, three conditions thought to increase EBS's process gains and decrease its process losses (thus improving its productivity) are identified. A laboratory experiment designed to compare the productivity of ad hoc and established groups using four brainstorming technologies (nominal, EBS-anonymous, EBS-nonanonymous, verbal), generating ideas on socially sensitive and less sensitive topics, in the presence and absence of contextual cues, is then described. The results of the experiment showed that overall, groups using nominal brainstorming significantly outperformed groups using the other three brainstorming approaches. Further, even under conditions thought to be favorable to EBS, nominal brainstorming groups were at least as productive as EBS groups. The paper explains these results by suggesting that the process gains of EBS may not be as large as expected and that the presence of four additional process losses inherent to EBS technologies impair its productivity. It is also argued that the prevailing popularity of group brainstorming (verbal or electronic) in organizations may be explained by the perceived productivity of those approaches. These perceptions, which are at odds with reality, create the illusion of productivity. A similar misperception may also cause an illusion of EBS productivity in the research community, especially when perceptual measures of group performance are used.

R. Brent Gallupe

Papers

A foundation for the study of group decision support systems

Electronic brainstorming and group size

The evolution of IS job skills: a content analysis of IS job advertisements from 1970 to 1990

Computer-based support for group problem-finding: an exprimental investigation

Electronic Brainstorming: the Illusion of Productivity