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

Thank you for downloading using multivariate statistics. As you may know, people have look hundreds times for their favorite novels like this using multivariate statistics, but end up in infectious downloads. Rather than reading a good book with a cup of tea in the afternoon, instead they juggled with some harmful bugs inside their laptop. using multivariate statistics is available in our digital library an online access to it is set as public so you can download it instantly. Our books collection saves in multiple locations, allowing you to get the most less latency time to download any of our books like this one. Merely said, the using multivariate statistics is universally compatible with any devices to read.

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From the Publisher:
Written by the author of the best-selling HyperText & HyperMedia, this book provides an excellent guide to the methods of usability engineering. Special features: emphasizes cost-effective methods that will help developers improve their user interfaces immediately, shows you how to avoid the four most frequently listed reasons for delay in software projects, provides step-by-step information about which methods to use at various stages during the development life cycle, and offers information on the unique issues relating to informational usability. You do not need to have previous knowledge of usability to implement the methods provided, yet all of the latest research is covered.

Usability Engineering

Experience and Educationis the best concise statement on education ever published by John Dewey, the man acknowledged to be the pre-eminent educational theorist of the twentieth century. Written more than two decades after Democracy and Education(Dewey's most comprehensive statement of his position in educational philosophy), this book demonstrates how Dewey reformulated his ideas as a result of his intervening experience with the progressive schools and in the light of the criticisms his theories had received. Analysing both "traditional" and "progressive" education, Dr. Dewey here insists that neither the old nor the new education is adequate and that each is miseducative because neither of them applies the principles of a carefully developed philosophy of experience. Many pages of this volume illustrate Dr. Dewey's ideas for a philosophy of experience and its relation to education. He particularly urges that all teachers and educators looking for a new movement in education should think in terms of the deeped and larger issues of education rather than in terms of some divisive "ism" about education, even such an "ism" as "progressivism." His philosophy, here expressed in its most essential, most readable form, predicates an American educational system that respects all sources of experience, on that offers a true learning situation that is both historical and social, both orderly and dynamic.

经验与教育 = Experience and education

Usability Engineering: Scenario-Based Development of Human-Computer Interaction is a radical departure from traditional books that emphasize theory and address experts. This book focuses on the realities of product development, showing how user interaction scenarios can make usability practices an integral part of interactive system development. As you'll learn, usability engineering is not the application of inflexible rules; it's a process of analysis, prototyping, and problem solving in which you evaluate tradeoffs, make reasoned decisions, and maximize the overall value of your product.

Usability Engineering: Scenario-Based Development of Human-Computer Interaction

From the Publisher:
Difficult to learn and awkward to use, today's information systems often change our activities in ways that we do not need or want. The problem lies in the software development process. In this book John Carroll shows how a pervasive but underused element of design practice, the scenario, can transform information systems design. 
Traditional textbook approaches manage the complexity of the design process via abstraction, treating design problems as if they were composites of puzzles. Scenario-based design uses concretization. A scenario is a concrete story about use. For example: "A person turned on a computer; the screen displayed a button labeled Start; the person used the mouse to select the button." Scenarios are a vocabulary for coordinating the central tasks of system developmentunderstanding people's needs, envisioning new activities and technologies, designing effective systems and software, and drawing general lessons from systems as they are developed and used. Instead of designing software by listing requirements, functions, and code modules, the designer focuses first on the activities that need to be supported and then allows descriptions of those activities to drive everything else. 
In addition to a comprehensive discussion of the principles of scenario-based design, the book includes in-depth examples of its application.

Making Use: Scenario-Based Design of Human-Computer Interactions

Partial table of contents: Work Processes: Scenarios as a Preliminary Vocabulary (K. Kuutti). Creating Contexts for Design (M. Kyng). Scenario Use in the Design of a Speech Recognition System (J. Karat). Usage Representations for Reuse of Design Insights: A Case Study of Access to On-Line Books (T. Carey & M. Rusli). Design Space Analysis and Use Representations (A. MacLean & D. McKerlie). Rapid Prototyping of User Interfaces Driven by Task Models (P. Johnson, et al.). Generating Object-Oriented Design Representations via Scenario Queries (S. Robertson). The Use-Case Construct in Object-Oriented Software Engineering (I. Jacobson). Discussion: Scenarios as Engines of Design (R. Mack). Some Reflections on Scenarios (B. Nardi). Index.

Scenario-based design: envisioning work and technology in system development

Publisher Summary Opening up the design process to the intended users and descriptions of their projected use entail many technical issues. People need to develop new vocabularies for discussing and characterizing designs in terms of the projected activities of the intended users. These vocabularies should be accessible to the users, so that they can help define the technology they will use. People also need to be able to integrate and coordinate such use-oriented design representations with other representations produced in the course of system development. Further, people need to be able to assess design alternatives with use-oriented criteria and to integrate and coordinate such assessments with those that they make on traditional grounds, like correctness, reliability, efficiency, and maintainability. People need to develop new sorts of tools and techniques to support the development and use of use-oriented representations and methods in design. People also need to produce education to help system developers understand the need for use oriented approaches and adopt such methods in their work. This is a lot to ask for, but to do anything less is to risk losing sight of the line among human beings using and controlling their technology and its antithesis.

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John M. Carroll

Papers

Usability Engineering: Scenario-Based Development of Human-Computer Interaction

Making Use: Scenario-Based Design of Human-Computer Interactions

Scenario-based design: envisioning work and technology in system development

Scenario-based design

Five reasons for scenario-based design