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Mrs. Adams

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Evaluating Sources

Source Credibility Guide

Investigate six features of a source before deciding how much to trust it, what role it can play, and how confidently you can use its evidence.

Credibility depends on context.

A source may be credible for one purpose and weak for another. Work through all six areas, then make a reasoned judgment based on your inquiry, not a checklist score.

Adapted from Turnitin’s Source Credibility Guide, with AP Seminar evaluation questions added.
1

Origin

Where did the information come from?

Ask

  • Who published or distributed it?
  • What kind of source is it?
  • Is it primary or secondary?
  • Can you locate the original version?

Look deeper

  • Read the publisher’s About page laterally.
  • Check editorial or review standards.
  • Trace reposted statistics and quotations.
  • Remember: a domain is a clue, not proof.
Do not stop at the URL. Investigate the organization responsible for the information and how it reached you.
2

Author

Who created it, and how would that person know?

Ask

  • What relevant education or experience does the author have?
  • Has the author published credible work on this topic?
  • Is the author identified clearly?
  • Is the expertise relevant to this exact claim?

Add RAVEN’s strongest questions

  • Ability to observe: Did the author witness, conduct, or access the evidence?
  • Vested interest: What might the author gain if readers accept the claim?
  • Is the author speaking inside or outside their field?
Impressive credentials are not enough. Explain why this author is positioned to know about this specific subject.
3

Purpose

Why was the source created?

Ask

  • Was it created to inform, persuade, entertain, advocate, or sell?
  • Who is the intended audience?
  • Who funded or sponsored the work?
  • What action or belief does the creator want from the audience?

Watch for

  • Advertising presented as information
  • Selective evidence or missing context
  • Emotional or urgent language
  • Unclear sponsorship or funding
A persuasive purpose does not automatically disqualify a source. It changes what you must verify and how you should use it.
4

Perspective

What experiences, assumptions, or interests shape the source?

Ask

  • What point of view is represented?
  • Which stakeholders or lenses are emphasized?
  • What voices or information are missing?
  • How does tone influence the audience?

Move beyond “biased”

  • Name the specific position or interest.
  • Explain how it shapes selection or interpretation.
  • Separate factual claims from value judgments.
  • Seek other informed perspectives.
Every source has a perspective. The goal is to understand its influence, not pretend that useful sources must be perfectly neutral.
5

Relevance

How directly does the source help answer your question?

Ask

  • Which part of the research question does it address?
  • Does it provide background, evidence, perspective, or a counterargument?
  • Is the population, place, or time period comparable?
  • Is the information current enough for this topic?

Do not confuse “related” with “relevant”

  • Identify the exact claim the source could support.
  • Check when the research, not only the article, was produced.
  • Note important differences in context.
  • Decide whether the connection is direct or limited.
A highly credible source can still be irrelevant. Relevance is the connection between this information and the work your argument needs it to do.
6

Academic Quality

How carefully is the source researched, supported, and reviewed?

Ask

  • Are claims supported with evidence and citations?
  • Can the evidence be verified?
  • Are methods, data, or limitations explained?
  • Was the work peer reviewed or editorially reviewed?

Add CRAAP’s accuracy check

  • Compare important claims with independent sources.
  • Follow citations to the original evidence.
  • Look for corrections, retractions, or disputed findings.
  • Check whether conclusions exceed the evidence.
“Peer reviewed” is not the end of evaluation. You must still understand the research and judge whether its evidence supports the claim being made.

Turn your notes into an evaluation

A list of findings is not an evaluation until you explain what those findings mean for the source’s credibility and use.

This source is credible for ______ because ______. It is relevant to my inquiry because ______. However, ______ limits how confidently I can use it to support ______.

Quick-reference poster

Use Turnitin’s Source Credibility Guide poster as a reminder of the six categories. The poster starts the questioning; this page helps you investigate more deeply.

Open the Source Guide Poster →
Next: Verify Online Information →
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Mrs. Adams' Tip

Do not write, “This source is credible because the author is an expert.” Identify the relevant expertise and explain why it strengthens this particular information or claim.