When choosing a resource, it is important to determine the credibility and reliability of that resource. To do that, we recommend the C.R.A.P. test:
Sources are divided into two main groups; primary and secondary.
Primary sources provide a firsthand account or insider's look at a specific person, a specific time period, or a specific event. If a primary source could speak to us it would say, “I was there; this is my experience or my experiment.” Examples of primary sources include diaries, personal journals, autobiographies, memoirs, personal correspondence, interviews, speeches, newspaper articles or news footage from a specific time in history, official records, original photographs, creative works such as plays, poetry, music, or art, and also original research data. Primary sources can be documents, photographs, film or video footage, and objects/artifacts. Please note that primary source does not necessarily equal factual source. Primary sources provide firsthand accounts of an event, experience, or experiment. It is up to you, the researcher, to evaluate each of those accounts individually to build an informed, knowledgeable, and well-rounded assertion about your topic.
A secondary source is an interpretation or analysis of one or more primary sources. If a secondary source could speak to us it would say, “I wasn’t there but I have researched, studied, and analyzed this topic and these are my thoughts on the matter.” Examples of secondary resources include such publications as biographies, commentaries, criticisms, textbooks, articles, and critical essays.
The first book on the left, I am Not Spock, was written by Leonard Nimoy and is his personal account of his experiences of portraying the character of Spock in the television series Star Trek. The next book, Star Trek: Movie Memories, was written by William Shatner who portrayed the character of Captain James T. Kirk and discusses his experiences during the creation of the Star Trek films. Each of these sources says to us, "I was there; this is my experience." These are primary sources.
The last book, Star Trek as Myth, is a collection of essays about Star Trek. This book is comprised of the different authors' interpretations and analysis of the mythology of the television series and films. This book says to us, “I wasn’t there but I have researched, studied, and analyzed this topic and these are my thoughts on the matter.” This book is a secondary resource.
SIFT is a helpful acronym for initially evaluating source credibility. SIFT (from Mike Caulfield) stands for:
Modified from Mike Caulfield's SIFT (Four Moves), which is licensed under a Creative Commons Attribution 4.0 International License.
Later, when you determine that the site is worth your time, you can analyze the source's content more carefully.
5 Clues that the article is peer-reviewed: