A secondary source is any work that describes, explains, interprets, or analyzes information that originally comes from somewhere else, rather than presenting that information first‑hand.

Quick Scoop: Simple Definition

  • A secondary source gives second‑hand information about an event, idea, text, or experiment.
  • It is based on primary sources (original data, documents, interviews, artworks, experiments) but is not itself an original record of the event.
  • It often summarizes, critiques, compares, or evaluates primary sources to make them easier to understand.

Think of it like this:

If a primary source is the raw footage of a game, a secondary source is the sports commentator’s analysis later that night.

Key Features of a Secondary Source

  • Not first‑hand : The author did not directly witness, conduct, or create the original event or data.
  • Interpretive or analytical : It tries to explain, interpret, or judge primary information.
  • Often created later : Usually written after some time has passed, with the benefit of hindsight and other evidence.
  • Uses multiple sources : Frequently combines many primary (and other secondary) sources into one overview.

Common Examples

Here are typical things that count as secondary sources in research and study:

  • Textbooks that explain a topic
  • Academic journal articles that analyze earlier studies (e.g., a literature review)
  • Books that interpret historical events
  • Biographies of famous people
  • Critical essays about novels, films, music, or art
  • Encyclopedias and dictionaries
  • Newspaper opinion pieces or editorials
  • Reviews (book, film, theatre, music)

All of these are a step away from the original event or data and are commenting on it, not recording it first‑hand.

Secondary vs Primary Source (Quick Contrast)

  • Primary source : Original, first‑hand evidence (a diary, a scientific experiment’s raw data, an interview transcript, a historical photo, a legal document).
  • Secondary source : A later work that describes, interprets, or evaluates those primary materials (a history book about the diary, a meta‑analysis of many experiments, a documentary explaining the event).

So when you see a source that is explaining, summarizing, or judging other sources rather than presenting new, direct evidence, you’re probably looking at a secondary source.

Information gathered from public forums or data available on the internet and portrayed here.