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    Primary, Secondary, and Tertiary Sources: The Recipe for Research

    by Meghan Kowalski on 2025-04-09T08:00:00-04:00 | 0 Comments

    When starting a new research project, one of the challenges you might face is figuring out what kinds of sources to use. Sources of information are often categorized as primary, secondary, or tertiary. These categorizations reflect the source’s relationship to the original information or event being described.

    Understanding the distinctions between types of sources is an important part of being a researcher because different sources serve different purposes in the research process. In this post, we’ll explore the characteristics of primary, secondary, and tertiary sources with examples to help you identify and use these sources effectively.

     

    Primary Sources: Original Information

    Primary sources are original materials. They are records of evidence about an event or discovery that were created at the time the event or discovery occurred. Primary sources often share new information that has not been published before.

    Imagine you’re a chef preparing a dish. Your ingredients are like primary sources—they’re the raw, unprocessed food items you’re going to use. In the academic world, primary sources are the raw materials of research. They are the original, firsthand accounts or direct evidence of a topic under investigation.

    Examples of primary sources can include:

    • Academic/scholarly articles that share new data and findings (also called empirical research)
    • Personal letters, diaries, and journals
    • Interviews and surveys
    • Speeches
    • Photographs and artwork
    • Government documents and census data

    Primary sources give you direct access to original ideas, events, and data. They are the closest you can get to a specific event or moment in history without hopping in a time machine!

     

    Secondary Sources: Analysis and Interpretation

    Secondary sources are one step removed from the original event or information and were created at a later point in time.

    Think of secondary sources as a prepared dish. Just as a chef combines ingredients to create a meal, secondary sources synthesize, interpret, and discuss information from primary sources. In the academic world, secondary sources describe and analyze primary sources by providing context and different perspectives on a topic.

    Examples of secondary sources can include:

    • Academic or scholarly articles that interpret or review other research works and primary sources (also called non-empirical research and can include things like literature reviews, meta-analyses, and theoretical articles)
    • Books about historical events
    • Biographies
    • Literary analysis and criticism
    • Reviews of law and legislation
    • Political analyses and commentaries

    Secondary sources can help you get a broader understanding of a topic. They’re like having a knowledgeable friend explain something to you. They’ve done the heavy lifting of processing the primary information and have provided their own commentary too.

     

    Tertiary Sources: Summaries and Overviews

    Tertiary sources compile, summarize, or index information from both primary and secondary sources.

    If primary sources are the raw ingredients and secondary sources are the carefully prepared meal, tertiary sources are like a menu—they give you a quick overview of what’s available. In the academic world, tertiary sources are useful starting points for research and can help you learn background information about your research topic.

    Examples of tertiary sources can include:

    • Encyclopedias
    • Some textbooks
    • Almanacs
    • Fact books
    • Bibliographies
    • Directories
    • Manuals

    Tertiary sources can point you in the right direction and give you a general understanding of a topic before you dive into more specific primary or secondary sources.

     

    Why Does It Matter?

    Understanding the differences between these types of sources is important for a few reasons:

    1. Assignment Requirements: Your professor may specify which types of sources you should use for a research assignment. Knowing the differences between these types of sources will help you meet the requirements and understand which sources are most suitable for the task at hand.
    2. Research Quality: Knowing which type of source you’re using helps you evaluate its reliability and appropriateness for your research.
    3. Critical Thinking: Recognizing the types of sources you’re using helps you think critically about how and why the information was created, processed, and shared.

     

    The distinctions between primary, secondary, and tertiary sources aren’t always clear-cut. Some sources might fit into multiple categories depending on how they’re used. When in doubt, ask a librarian for clarification!

    Whether you’re just starting your research or trying to refine your techniques, learning these different types of sources will help you navigate the vast information landscape and find the best sources for your needs!


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