Currency refers to the timeliness of 
      information. In printed documents, the date of publication is the first 
      indicator of currency. For some types of information, currency is not an 
      issue: authorship or place in the historical record is more important 
      (e.g., T. S. Eliot's essays on tradition in literature). For many other 
      types of data, however, currency is extremely important, as is the 
      regularity with which the data is updated. Apply the following criteria to 
      ascertain currency: 
      
      
        - The document includes the date(s) at which the information was 
        gathered (e.g., US Census data). 
        
 - The document refers to clearly dated information (e.g., "Based on 
        1990 US Census data."). 
        
 - Where there is a need to add data or update it on a constant basis, 
        the document includes information on the regularity of updates. 
        
 - The document includes a publication date or a "last updated" date. 
        
 - The document includes a date of copyright. 
        
 - If no date is given in an electronic document, you can view the 
        directory in which it resides and read the date of latest modification. 
        
 
      If you found information using one of the search engines 
      available on the Internet, such as AltaVista or InfoSeek, a 
      directory of the Internet such as Yahoo, or any of the services that rate 
      World Wide Web pages, you need to know:
      
      
        - How the search engine decides the order in which it returns 
        information requested. Some Internet search engines "sell" top space to 
        advertisers who pay them to do so. Read Pay for 
        Placement? from Searchenginewatch.com. 
        
 - That Internet search engines aren't like the databases found in 
        libraries. Library databases include subject headings, abstracts, and 
        other evaluative information created by information professionals to 
        make searching more accurate. In addition, library databases index more 
        permanent and reliable information. 
        
 - How that search engine looks for information, and how often their 
        information is updated. An excellent source for search engine 
        information is Search 
        Engine Showdown, written by Greg R. Notess. 
        
All information, whether in print or by byte, needs to 
        be evaluated by readers for authority, appropriateness, and other 
        personal criteria for value. If you find information that is "too 
        good to be true", it probably is. Never use information that you cannot 
        verify. Establishing and learning criteria to filter information 
        you find on the Internet is a good beginning for becoming a critical 
        consumer of information in all forms. "Cast a cold eye" (as Yeats wrote) 
        on everything you read. Question it. Look for other sources that can 
        authenticate or corroborate what you find. Learn to be skeptical and 
        then learn to trust your instincts.
        
© 1996 Elizabeth E. Kirk