Service Alert
Goal: Find a quality source, relevant for your information needs.
rel·e·vance (noun): the quality or state of being, closely connected or appropriate. (i.e., "this film has contemporary relevance")
Relevance considers the importance of the information for your research needs. A relevant information source answers your research question. To determine relevance, the purpose and bias must be understood. In fact, all aspects of evaluation must be taken into consideration to determine relevance.
Remember, search engines match words, not concepts. Some search engines and databases will sort search results by "relevance." This only means that there is an algorithm which uses measures like how many times your search words appear on the page, or whether they are in the title. The computer can't determine whether the source is actually relevant to you -- only you can do that.
Look for an abstract or summary that can tell you more about the source.
In a book, you might need to scan the table of contents or even read the preface or introduction.
In a scholarly research article, read the abstract first - it should summarize the research. Then read the introduction, and the discussion and/or conclusion before diving into to the rest of the article.