Stanford Web Credibility Project

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The Stanford Web Credibility Project, which involves assessments of website credibility conducted by the Stanford University Persuasive Technology Lab, is an investigative examination of what leads people to believe in the veracity of content found on the Web. The goal of the project is to enhance website design and to promote further research on the credibility of Web resources.

Contents

Origins

The Web has become an important channel for exchanging information and services, resulting in a greater need for methods to ascertain the credibility of websites. In response, since 1998, the Stanford Persuasive Technology Lab (SPTL) has investigated what causes people to believe, or not, what they find online. SPTL provides insight into how computers can be designed to change what people think and do, an area called captology. Directed by experimental psychologist B.J. Fogg, the Stanford team includes social scientists, designers, and technologists who research and design interactive products that motivate and influence their users.

Objectives

The ongoing research of the Stanford Web Credibility Project includes:

How Do People Evaluate a Web Site's Credibility?

A study by the Stanford Web Credibility Project, How Do People Evaluate a Web Site's Credibility? Results from a Large Study, published in 2002, invited 2,684 "average people" to rate the credibility of websites in ten content areas. The study evaluated the credibility of two live websites randomly assigned from one of ten content categories: e-commerce, entertainment, finance, health, news, nonprofit, opinion or review, search engines, sports, and travel. A total of one hundred sites were assessed.

This study was launched jointly with a parallel, expert-focused project conducted by Sliced Bread Design, LLC. In their study, Experts vs. Online Consumers: A Comparative Credibility Study of Health and Finance Web Sites, fifteen health and finance experts were asked to assess the credibility of the same industry-specific sites as those reviewed by the Stanford PTL consumers. The Sliced Bread Design study revealed that health and finance experts were far less concerned about the surface aspects of these industry-specific types of sites and more concerned about the breadth, depth, and quality of a site's information. Similarly, Consumer Reports WebWatch, which commissioned the study, has the goal to investigate, inform, and improve the credibility of information published on the World Wide Web. Consumer Reports had plans for a similar investigation into whether consumers actually perform the necessary credibility checks while online, and had already conducted a national poll concerning consumer awareness of privacy policies.

The common goals of the three organizations led to a collaborative research effort that may represent the largest web credibility project ever conducted. The project, based on three years of research that included over 4,500 people, enabled the lab to publish Stanford Guidelines for Web Credibility, which established ten guidelines for building the credibility of a website.

Findings

The study found that when people assessed a real website's credibility, they did not use rigorous criteria, a contrast to earlier national survey findings by Consumer Reports WebWatch, A Matter of Trust: What Users Want From Web Sites (April 16, 2002). The data showed that the average consumer paid far more attention to the superficial aspects of a site, such as visual cues, than to its content. For example, nearly half of all consumers (or 46.1%) in the study assessed the credibility of sites based in part on the appeal of the overall visual design of a site, including layout, typography, font size and color schemes.

This reliance on a site's overall visual appeal to gauge credibility occurred more often with some categories of sites then others. Consumer credibility-related comments about visual design issues occurred with more frequency with websites dedicated to finance, 54.6%, search engines, 52.6%, travel, 50.5%, and e-commerce sites, 46.2%, and less frequently when assessing health, 41.8%, news, 39.6%, and nonprofit, 39.4%.

"I would like to think that when people go on the Web they're very tough integrators of information, they compare sources, they think really hard," says Fogg, "but the truth of the matter--and I didn't want to find this in the research but it's very clear--is that people do judge a Web site by how it looks. That's the first test of the Web site. And if it doesn't look credible or it doesn't look like what they expect it to be, they go elsewhere. It doesn't get a second test. And it's not so different from other things in life. It's the way we judge automobiles and politicians.

GuidelineAdditional Comments
1. Make it easy to verify the accuracy of the information on your site.You can build web site credibility by providing third-party support (citations, references, source material) for information you present, especially if you link to this evidence. Even if people don't follow these links, you've shown confidence in your material.
2. Show that there's a real organization behind your site.Showing that your web site is for a legitimate organization will boost the site's credibility. The easiest way to do this is by listing a physical address. Other features can also help, such as posting a photo of your offices or listing a membership with the chamber of commerce.
3. Highlight the expertise in your organization and in the content and services you provide.Do you have experts on your team? Are your contributors or service providers authorities? Be sure to give their credentials. Are you affiliated with a respected organization? Make that clear. Conversely, don't link to outside sites that are not credible. Your site becomes less credible by association.
4. Show that honest and trustworthy people stand behind your site.The first part of this guideline is to show there are real people behind the site and in the organization. Next, find a way to convey their trustworthiness through images or text. For example, some sites post employee bios that tell about family or hobbies.
5. Make it easy to contact you.A simple way to boost your site's credibility is by making your contact information clear: phone number, physical address, and email address.
6. Design your site so it looks professional (or is appropriate for your purpose).We find that people quickly evaluate a site by visual design alone. When designing your site, pay attention to layout, typography, images, consistency issues, and more. Of course, not all sites gain credibility by looking like IBM.com. The visual design should match the site's purpose.
7. Make your site easy to use—and useful.We're squeezing two guidelines into one here. Our research shows that sites win credibility points by being both easy to use and useful. Some site operators forget about users when they cater to their own company's ego or try to show the dazzling things they can do with web technology.
8. Update your site's content often (at least show it's been reviewed recently).People assign more credibility to sites that show they have been recently updated or reviewed.
9. Use restraint with any promotional content (e.g., ads, offers).If possible, avoid having ads on your site. If you must have ads, clearly distinguish the sponsored content from your own. Avoid pop-up ads, unless you don't mind annoying users and losing credibility. As for writing style, try to be clear, direct, and sincere.
10. Avoid errors of all types, no matter how small they seem.Typographical errors and broken links hurt a site's credibility more than most people imagine. It's also important to keep your site up and running.

See also

Related Research Articles

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Evaluation is a systematic determination of a subject's merit, worth and significance, using criteria governed by a set of standards. It can assist an organization, program, design, project or any other intervention or initiative to assess any aim, realisable concept/proposal, or any alternative, to help in decision-making; or to ascertain the degree of achievement or value in regard to the aim and objectives and results of any such action that has been completed. The primary purpose of evaluation, in addition to gaining insight into prior or existing initiatives, is to enable reflection and assist in the identification of future change. Evaluation is often used to characterize and appraise subjects of interest in a wide range of human enterprises, including the arts, criminal justice, foundations, non-profit organizations, government, health care, and other human services. It is long term and done at the end of a period of time.

Persuasive technology is broadly defined as technology that is designed to change attitudes or behaviors of the users through persuasion and social influence, but not necessarily through coercion. Such technologies are regularly used in sales, diplomacy, politics, religion, military training, public health, and management, and may potentially be used in any area of human-human or human-computer interaction. Most self-identified persuasive technology research focuses on interactive, computational technologies, including desktop computers, Internet services, video games, and mobile devices, but this incorporates and builds on the results, theories, and methods of experimental psychology, rhetoric, and human-computer interaction. The design of persuasive technologies can be seen as a particular case of design with intent.

Usability Capacity of a system for its users to perform tasks

Usability can be described as the capacity of a system to provide a condition for its users to perform the tasks safely, effectively, and efficiently while enjoying the experience. In software engineering, usability is the degree to which a software can be used by specified consumers to achieve quantified objectives with effectiveness, efficiency, and satisfaction in a quantified context of use.

The Stanford Persuasive Technology Lab performs research into computers as persuasive technologies. It is part of H-STAR, the Human Sciences and Technologies Advanced Research Institute and housed in Cordura Hall.

A technical writer is a professional information communicator whose task is to transfer information between two or more parties, through any medium that best facilitates the transfer and comprehension of the information. Technical writers research and create information through a variety of delivery media. Example types of information include online help, manuals, white papers, design specifications, project plans, and software test plans. With the rise of e-learning, technical writers are increasingly becoming involved with creating online training material.

Credibility Believability of a source or message

Credibility comprises the objective and subjective components of the believability of a source or message. Credibility dates back to Aristotle theory of Rhetoric. Aristotle defines rhetoric as the ability to see what is possibly persuasive in every situation. He divided the means of persuasion into three categories, namely Ethos, Pathos, and Logos, which he believed have the capacity to influence the receiver of a message. According to Aristotle, the term "Ethos" deals with the character of the speaker. The intent of the speaker is to appear credible. In fact, the speaker's ethos is a rhetorical strategy employed by an orator whose purpose is to "inspire trust in his audience." Credibility has two key components: trustworthiness and expertise, which both have objective and subjective components. Trustworthiness is based more on subjective factors, but can include objective measurements such as established reliability. Expertise can be similarly subjectively perceived, but also includes relatively objective characteristics of the source or message. Secondary components of credibility include source dynamism (charisma) and physical attractiveness.

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Elaboration likelihood model Dual process theory

The elaboration likelihood model (ELM) of persuasion is a dual process theory describing the change of attitudes. The ELM was developed by Richard E. Petty and John Cacioppo in 1980. The model aims to explain different ways of processing stimuli, why they are used, and their outcomes on attitude change. The ELM proposes two major routes to persuasion: the central route and the peripheral route.

B. J. Fogg

Brian Jeffrey Fogg is an American social scientist who is a research associate and adjunct professor at Stanford University and author. He is the founder and director of the Stanford Persuasive Technology Lab, later renamed as Behavior Design Lab.

Captology is the study of computers as persuasive technologies. This area of inquiry explores the overlapping space between persuasion in general and computing technology. This includes the design, research, and program analysis of interactive computing products created for the purpose of changing people's attitudes or behaviors.

Political communication

Political communication(s): is a subfield of communication and political science that is concerned with how information spreads and influences politics, policy makers, the news media, and citizens. Since the advent of the World Wide Web, the amount of data to analyze has exploded and researchers are shifting to computational methods to study the dynamics of political communication. In recent years, machine learning, natural language processing, and network analysis have become key tools in the subfield. It deals with the production, dissemination, procession and effects of information, both through mass media and interpersonally, within a political context. This includes the study of the media, the analysis of speeches by politicians, those that are trying to influence the political process, and the formal and informal conversations among members of the public, among other aspects. The media acts as a bridge between government and public. Political communication can be defined as the connection concerning politics and citizens and the interaction modes that connect these groups to each other. Whether the relationship is formed by the modes of persuasion, Pathos, Ethos or Logos.

Applied aesthetics is the application of the branch of philosophy of aesthetics to cultural constructs. In a variety of fields, artifacts are created that have both practical functionality and aesthetic affectation. In some cases, aesthetics is primary, and in others, functionality is primary. At best, the two needs are synergistic, in which "beauty" makes an artifact work better, or in which more functional artifacts are appreciated as aesthetically pleasing. This achievement of form and function, of art and science, of beauty and usefulness, is the primary goal of design, in all of its domains.

Source credibility is "a term commonly used to imply a communicator's positive characteristics that affect the receiver's acceptance of a message." Academic studies of this topic began in the 20th century and were given a special emphasis during World War II, when the US government sought to use propaganda to influence public opinion in support of the war effort. Psychologist Carl Haviland and his colleagues worked at the War Department upon this during the 1940s and then continued experimental studies at Yale University. They built upon the work of researchers in the first half of the 20th century who had developed a Source-Message-Channel-Receiver model of communication and, with Muzafer Sherif, developed this as part of their theories of persuasion and social judgement.

The heuristic-systematic model of information processing (HSM) is a widely recognized model by Shelly Chaiken that attempts to explain how people receive and process persuasive messages. The model states that individuals can process messages in one of two ways: heuristically or systematically. Whereas systematic processing entails careful and deliberative processing of a message, heuristic processing entails the use of simplifying decision rules or ‘heuristics’ to quickly assess the message content. The guiding belief with this model is that individuals are more apt to minimize their use of cognitive resources, thus affecting the intake and processing of messages. HSM predicts that processing type will influence the extent to which a person is persuaded or exhibits lasting attitude change. HSM is quite similar to the elaboration likelihood model, or ELM. Both models were predominantly developed in the early to mid-1980s and share many of the same concepts and ideas.

The rhetoric of health and medicine is an academic discipline concerning language and symbols in health and medicine. Rhetoric most commonly refers to the persuasive element in human interactions and is often best studied in the specific situations in which it occurs. As a subfield of rhetoric, medical rhetoric specifically analyzes and evaluates the structure, delivery, and intention of communications messages in medicine- and health-related contexts. Primary topics of focus includes patient-physician communication, health literacy, language that constructs disease knowledge, and pharmaceutical advertising. The general research areas are described below. Medical rhetoric is a more focused subfield of the rhetoric of science.

Behavioural design Field of design concerned with the influence of design on behavior

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Vaccine Safety Net Network of medical information websites

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