Which factor most strongly signals a source's credibility?

• A. Explicit credentials and expertise.
• B. The author uses sensational headlines.
• C. The publication is self-published without peer review.
• D. The source is lengthy but lacks author.

Answer: (A)

Credibility in sources comes from knowing who wrote it and what they know. Explicit credentials and expertise signal that the author has formal training or recognized experience in the topic, which directly supports the reliability of the information. When you can verify the author’s background and see that their qualifications align with the subject, you have a strong basis for trusting what they claim.

In contrast, sensational headlines are designed to attract attention and often mislead or oversimplify, which weakens trust. A source that is self-published without any outside review lacks a quality-check process that helps catch errors, reducing its credibility. And a long piece without an identifiable author can’t be evaluated for accountability or expertise, so length alone doesn’t make it trustworthy.

So, look for clear, relevant credentials and identifiable expertise to judge credibility, and be cautious of signals that suggest a lack of validation or accountability.