Evaluating Information Sources

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Presentation transcript:

Evaluating Information Sources

The Web and print sources (ex The Web and print sources (ex. books, magazines, newspaper) provide billions of pieces of information.

Unfortunately not all are reliable, relevant accurate, unbiased, or up-to-date.

Therefore before being used, information should be evaluated.

A useful tool of evaluation is CARRDS.

CARRDS C CREDIBILITY A ACCURACY R RELIABLITY R RELEVANCE D DATE S SOURCE S SCOPE & PURPOSE

CREDIBILITY CREDIBILITY – The quality and capacity of belief. Who is the author? What are his or her credentials? Education? Experience? What evidence is offered of his or her knowledge?

ACCURACY ACCURACY – Freedom from mistake and error. Can facts, statistics, or other information be verified through other sources? Do there appear to be errors on the page (i.e., spelling, grammar, facts)?

RELIABILITY RELIABILITY – The extent to which a source gives the same information as other sources. Does the source present a particular view or bias? Is the information affiliated with an organization that has a particular political or social agenda.

RELEVANCE RELEVANCE – The relationship to the focused topic or question. Does the information directly support the thesis or help to answer the question? Can it be eliminated or ignored because it simply does not help?

DATE DATE – The time at which an information source is published or produced. Does this project need current, up-to-date information? When was this Web page created? When was it last updated?

SOURCE SOURCE – A primary reference work or point of origin. Is the information based on primary or secondary sources? Did the author document his or her sources? What kind of links or further reading did the author choose?

SCOPE & PURPOSE SOURCE & PURPOSE – The range of information on a given topic and the reason behind its creation. Does this source address the thesis in a comprehensive or peripheral way? Is it material that can easily be read and understood?

These questions should be posed each time a research source is considered. If the source does not pass any element of the CARRDS test, it should not be used.

The free Web is the part of the Web that is accessible by search engines. A search engine is an information retrieval system. It is the most common tool used to locate information on the Web. Search engines help to minimize the time required to find information and the amount of information which must be consulted.

Examples of Search Engines A search engine is often free and so you get what you pay for……it is sometimes not trustworthy. Examples: AltaVista Infoseek Google Yahoo Excite Dogplie Lycos

Another strategy designed for evaluating Web content is to examine the end or suffix of the domain name. This helps to: 1. gauge the validity of the information and 2. gauge any potential bias.

The suffix identifies who the source of information is and, therefore, what their purpose is in conveying that information.

Examples of Domain Suffixes .com – A commercial site. Purpose to sell a product or service. May have a built-in bias that you must be aware of. .biz – A business that could be trying to sell a product or service. May have built-in bias. .edu – A school, university, museum, or educational site. Normally reliable. .gov – A U.S. government site. Normally reliable. .int – An international institution. Normally reliable. .mil – A U.S. military site. Normally reliable. .museum – A museum. Often reliable .name – An individual Internet user. Not reliable and may have bias .net – A network service provider, Internet administrative site. .org – An organization, often non-profit. These sites can provide accurate information, but usually have bias. .pro – A professional’s site. ~ (tilde) or % – A personal site that varies in its credibility