5 Evaluating Sources
Learn to judge how well a source supports a particular claim by examining expertise, evidence, timeliness, purpose, and potential conflicts of interest.
Judge in context
A source is not trustworthy simply because it looks professional, appears first in a search, or comes from a familiar institution. depends on how well the source supports the specific claim and intended use.
Assess , , purpose, and interests together. No single credential or checklist proves that a source is correct; is a judgment made in context.
and authority
Ask who created the information, what relevant training or experience they have, and whether the claim falls within their area of . An expert in one field may not be qualified to make claims in another.
Check the author’s institutional affiliation and other work, but assess the specific source rather than relying on reputation alone. The publisher also provides context: it may be an established scholarly journal, public agency, news organization, advocacy group, or commercial site. A publisher’s identity is not a guarantee of accuracy.
, evidence, and timeliness
Reliable sources make it possible to inspect how their claims were reached. Look for evidence, citations, transparent methods, and relevant review or editing. Check that cited evidence actually supports the claim.
matters for important facts: compare them with independent, reputable sources. Publication date matters as well. Current information is essential for rapidly changing topics, while older sources can remain useful for historical or foundational questions.
can strengthen confidence in scholarly work, but it does not make a study infallible or establish that every conclusion is correct.
Purpose and conflicts of interest
Consider why a source was created and who benefits from its message. Its purpose may be to inform, persuade, sell, entertain, or advocate. Funding, employment, organizational affiliation, and financial or political interests may influence what is studied, emphasized, or left out.
A is a reason to examine the evidence and methods carefully, not automatic proof that a claim is false. Notice whether relevant interests are disclosed and whether the source acknowledges limitations or competing evidence.
Apply the evaluation
Suppose a company’s website claims that its supplement improves memory. The company may know its product well, but it also has a commercial interest. Check whether the claim links to well-designed studies, whether those studies tested the same product and outcome, and whether independent researchers or health authorities reach similar conclusions. A persuasive tone or expert endorsement is not a substitute for evidence.
For a quick evaluation, ask:
Who created and published the source, and what relevant do they have?
What evidence supports the claim, and can it be checked independently?
When was it published or updated, and does the topic require current information?
Why was it created, and what interests might shape its presentation?
How well does it fit the question and the kind of evidence needed?
For consequential claims, use multiple independent sources. Match to the claim, inspect evidence and methods, check date and , and consider purpose and potential conflicts of interest.