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Gibson D. Lewis Library Libguides

Evaluating Sources

Review this guide to learn about methods used to evaluate information! Is your source not passing your evaluation? Search tips to improve your research skills are included.

The Information Cycle

Information is dispersed through different source types as the time after an event passes. Learning about the information cycle can give us an indication as to which source type would be most appropriate to answer our research question. 

 

To begin: the event takes place! 

Immediately after an event, we hear basic information: Who, What, Where, When. In the weeks, months, and years after the event, the information we hear becomes more detailed and analytical. Read through the information below to assess which source type is best for you. If the 'event' you are researching just occurred, there are probably not going to be many journal articles or books about it.


Background Info & Current Events

Publishing basic information is easy! 

  • Social media posts can be published within seconds, hours, or days after
  • News outlets can publish information within hours, days, or weeks after
  • Web sources can publish information days, months, or even years after

 

SOURCE BEST FOR INTENDED AUDIENCE BE AWARE EXAMPLE
Social Media

General overviews, condensed threads of info

Anyone Author may not be a subject matter expert, sometimes lacks citations

Instagram Reel: @MelRobbins addresses Intermittent Fasting for women in her podcast; published September 20, 2023

News Outlets Breaking news, testimonies from witnesses, national, regional, or local issues Anyone Author may not be a subject matter expert, news stories develop over time (info can change), sometimes lacks citations

"Doctor Debunks 4 Common Myths About Intermittent Fasting" by Lucy Notarantonio for Newsweek published on August 22, 2024

Web Sources General overview, government info Anyone (varies based on the author and topic) Author may not be a subject matter expert, sometimes lacks citations

"Intermittent Fasting For Women: A Beginner's Guide" by Daisy Coyle for Healthline published on July 22, 2018 and last medically reviewed on December 6, 2023


Analysis & Opinion

Though more time is required to publish magazines and trade publications, we are sometimes most familiar with these sources! Trade publications are sources that combine scholarly and popular information that only professionals in specific industries would normally be interested in. They are easy to read and usually written in 'plan language', but are tailored to a hyper specific audience.

  • Magazines and trade publications can be published weeks or months after an event
SOURCE BEST FOR INTENDED AUDIENCE BE AWARE EXAMPLE
Magazine

Current event overviews, popular opinions 

Anyone - but usually targeted to those with similar interests  Author may not be a subject matter expert, sometimes lacks citations "How Good a Diet Is Intermittent Fasting?" by Claudia Wallis for Scientific American Magazine Vol. 323 No. 3 (September 2020), p. 23
Trade Publications  Industry specific research, some are peer-reviewed Professionals within the same industry Can be overly specialized, some are not peer-reviewed "Clinical Implications for Women of a Low-Carbohydrate or Ketogenic Diet with Intermittent Fasting" by Megan W Arbour, et al. in Nursing for Women's Health Vol. 25 No. 2 (April 2021), p. 139-151

Data & Research

If you're looking for a scholarly source, this is the place to be! Because the information in journal articles and books require extensive research, they are held in high regard. However, not all articles and books are scholarly. To evaluate scholarliness, visit the tab on the left.

  • Academic journal articles can publish months or years after
  • Books can be published years after
SOURCE BEST FOR INTENDED AUDIENCE BE AWARE EXAMPLE
Academic Journal Articles 

In-depth information, statistics, data, long lists of citations, some are peer-reviewed

Researchers, subject experts, students Narrow focus, very specialized, sometimes very technical, not easily understood by a beginner "The Impact of Intermittent Fasting on Fertility: A Focus on Polysystic Ovary Syndrome and Reproductive Outcomes in Women - A Systematic Review" by Maria Velissariou et al., in Metabolism Open Vol. 25 (March 2025)
Books  Very comprehensive, long lists of citations, some (not many) are peer-reviewed Anyone (varies based on the author and topic) Due to the long amount of time it takes to publish, info is sometimes outdated Healthy Eating for Life for Women by Physicians Committee for Responsible Medicine and Kristine Kieswer published in 2002