How to Evaluate a Source
for a Discussion Post
A practical walkthrough for the source evaluation discussion assignment — how to pick the right source, summarize it cleanly, apply three evaluation criteria with real evidence, and write a reflection on what citing it says about you as a writer. With APA format examples throughout.
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Get Expert Help →What This Assignment Is Actually Asking
Find a source on a topic that interests you. Summarize it for your classmates. Then evaluate it using three criteria from the list provided — credibility, relevancy, currency, accuracy, reasonability, reliability, or objectivity. Finally, reflect on whether citing this source would help or hurt your standing as a writer in a college or professional context. Every claim needs APA citations.
Three moving parts. A summary. An evaluation. A reflection. None of them are difficult on their own, but students lose marks by blending them together or by treating the evaluation as an opinion piece rather than an argument backed by evidence. The assignment is specifically asking you to prove your stance — those are two words worth paying attention to.
The 300-word minimum sounds easy. It’s actually a ceiling, not a floor. If you try to hit 300 words doing all three parts justice, you’ll find yourself cutting, not padding. A solid source summary runs 80–100 words. Each evaluation criterion takes 60–80 words if you’re citing evidence. The reflection adds another 60–80. You’re already at 300+ before you’ve added your APA references. Work with that structure and the word count takes care of itself.
One Thing Most Students Miss
The assignment says to cite evidence to prove your stance on the criteria. That means you need at least one additional source beyond the one you are evaluating — something that tells us what “high credibility” or “good currency” actually looks like, so you can measure your source against a standard. The Cornell University Library’s source evaluation guide is a reliable, citable external resource that explains these criteria clearly. Use it as your benchmark reference.
Picking the Right Source — This Decision Shapes Everything
The assignment says “a topic you are interested in.” That matters. Don’t pick something random — pick a topic you actually know enough about to evaluate the source intelligently. If you’re in a healthcare program, a nursing or public health article plays to your knowledge. If you’re in business, a management or economics piece gives you context. The evaluation becomes much stronger when you can spot what the source gets right or wrong from your own perspective.
The source type also matters strategically. A peer-reviewed journal article gives you strong credibility and accuracy to argue — easy wins on two criteria. A popular news article gives you more to say about objectivity and reasonability. A government or institutional report is great for currency and reliability. Pick a source type that gives you something to actually analyze, not just praise.
Peer-Reviewed Journal Article
High credibility, accuracy, and reliability. Easy to argue strongly. Best choice if you want the reflection to be positive. Harder to critique on objectivity.
Government or Institutional Report
Strong on currency and reliability. Clear authorship and purpose. Good for health, policy, or legal topics. Reflection almost always favorable.
Major News Article (e.g., BBC, Reuters)
Reasonable credibility, but more nuanced. Gives you more to say about objectivity and currency. Reflection can go either way depending on the outlet.
Organization Website (e.g., WHO, APA)
Credibility depends on the organization. Very strong for well-known bodies. Currency is usually clear. Good for broad topic introductions.
Personal Blog or Opinion Site
Gives you the most to say on objectivity, reliability, and credibility — usually critically. Useful if you want a more complex evaluation, but risky for the reflection section.
Social Media Post or Forum
Not appropriate for college-level citation. If your assignment allows it as a subject of evaluation (not as a source you’d cite in a paper), it gives you plenty to critique. Otherwise, avoid.
Don’t Pick a Source You Can Only Praise
A post that says “my source was great on all three criteria” is boring and underdeveloped. Pick a source that has at least one nuance — something where the argument is not completely obvious. That tension is what gives your evaluation substance and shows your critical thinking.
Writing the Summary — Tight, Accurate, No Editorializing
The summary is not a review. It is a neutral description of what the source says and does. Who wrote it, where it was published, when, and what the main argument or information is. Save your opinions for the evaluation section. If your summary already says “this is a reliable source,” you’ve mixed your two sections together — and that’s a structural problem the marker will notice.
Keep the summary to 80–100 words. Cover four things: the author or organization, the publication or platform, the publication date, and the main point or argument of the source. One or two sentences on each. That’s it. Then move on.
All Eight Evaluation Criteria — What Each One Actually Means
Before you can evaluate a source against a criterion, you need to know what that criterion actually requires. These are not interchangeable. Each asks a different question about the source.
Credibility
Who made this, and can they be trusted?Credibility asks about the authority and trustworthiness of the author or organization. A credible source is written by someone with documented expertise, affiliated with a recognized institution, and published in a venue with editorial oversight.
- Author qualifications — degree, institutional affiliation, track record
- Publisher — peer-reviewed journal, academic press, government body
- Peer review process — was the content vetted before publication?
- Citations — does the source itself cite credible sources?
Relevancy
Does it fit the topic and audience?Relevancy measures the fit between the source and the topic you are researching or discussing. A source can be highly credible but irrelevant — a 2005 peer-reviewed article on a topic that has changed completely is not useful, even if the authors are experts.
- Topic match — does the source directly address your subject?
- Audience alignment — is it written for a similar level as your work?
- Scope — is it too broad, too narrow, or just right?
- Applicability — can you actually use this content in context?
Currency
Is it recent enough to still be valid?Currency refers to how recently the source was published and whether the information it contains is still accurate given developments since publication. What “recent enough” means varies by discipline — medical and technology topics shift fast; historical and philosophical topics less so.
- Publication date — is it clearly stated?
- Field-appropriate recency — how fast does this topic change?
- Updates — has the source been revised or updated since?
- Links — are embedded references still live and accessible?
Accuracy
Is the information correct and supported?Accuracy asks whether the information can be verified, is free from factual errors, and is supported by evidence rather than assertion. You evaluate accuracy by cross-checking key claims against other reliable sources.
- Claims supported by data, research, or citations
- No factual errors you can identify from cross-referencing
- Methodology is transparent (for research-based sources)
- No significant omissions that distort the overall picture
Reasonability
Are the claims fair and balanced?Reasonability looks at whether the source’s arguments and claims are proportionate and logical — not sensationalist, not extreme, not built on emotional manipulation. A reasonable source acknowledges complexity and avoids sweeping generalizations.
- Language is measured, not inflammatory or alarmist
- Acknowledges counterarguments or limitations
- Conclusions proportionate to evidence presented
- No logical fallacies or manipulative framing
Reliability
Can you depend on this source consistently?Reliability is about consistency and track record. A reliable source produces dependable information repeatedly — it has not been associated with retractions, corrections, or discredited findings. It uses reproducible methods.
- Publisher has a consistent track record of quality
- Methods or processes are documented and repeatable
- No history of significant corrections or retractions
- The source is consistent with findings from similar sources
Objectivity — Is There an Agenda Shaping What’s Said?
Objectivity evaluates the degree to which a source is free from bias, particularly bias motivated by commercial, political, ideological, or personal interests. No source is fully objective — but the key question is whether the author’s perspective distorts the information in ways that mislead the reader. Funded research, advocacy organization publications, and promotional content all require objectivity scrutiny. Ask: who benefits from this source saying what it says?
For discussion posts, objectivity is often the most analytically rich criterion — especially if you choose a source that has a clear stake in its own conclusions. A pharmaceutical company publishing research on its own drug, a political think-tank writing about policy, or a commercial website reviewing its own products all give you substantial objectivity issues to analyze. Pair your evaluation with Purdue OWL’s guidance on source bias to add a credible scholarly reference to your argument.
Objectivity is distinct from accuracy — a source can be accurate but still selectively framed to serve an agendaHow to Choose Your Three Criteria — Pick for Analytical Leverage
Don’t pick the three criteria that make your source look best. Pick the three that give you the most to actually say. The assignment asks you to evaluate how the source “measures up” — that implies there is a standard to measure against, and your job is to demonstrate where it meets or falls short of that standard.
| Source Type | Best Criteria Choices | Why They Work |
|---|---|---|
| Peer-reviewed journal article | Credibility, Accuracy, Currency | You can directly argue credibility from the journal’s impact factor and peer review; accuracy from the methodology section; currency from the publication date relative to field developments |
| Government or WHO report | Reliability, Currency, Objectivity | Government bodies have documented track records (reliability); reports have clear dates (currency); their institutional mandate can be evaluated for objectivity |
| Major news outlet article | Objectivity, Reasonability, Currency | News coverage is inherently time-bound (currency); editorial framing raises objectivity questions; language and claims can be assessed for reasonability |
| Blog or opinion piece | Credibility, Reliability, Objectivity | Anonymous or unverified authorship (credibility); no editorial process (reliability); clear personal or commercial perspective (objectivity) — all give you substantive critical arguments |
| Industry or advocacy report | Objectivity, Accuracy, Reasonability | Industry funding creates objectivity questions; selective data can affect accuracy; advocacy framing can stretch what the evidence reasonably supports |
Picking criteria where the argument is genuinely interesting — where there is something real to analyze — is what separates a discussion post that earns full marks from one that just ticks boxes.
— Information literacy principle applied to academic writingApplying Each Criterion — The Structure That Gets Marks
Each criterion evaluation should follow a consistent pattern: state your claim, give specific evidence from the source, connect it to what the criterion actually requires, and cite a reference that defines or contextualizes the criterion. One paragraph per criterion is the right scope. Don’t write three sentences — and don’t write a page.
Claim → Source Evidence → Criterion Standard → External Citation
Claim: Make a clear statement about how the source performs on this criterion. “The source scores strongly on credibility” or “The source raises concerns around objectivity.” Don’t hedge — take a position.
Source evidence: Point to something specific in the source that supports your claim. The author’s institutional affiliation, the journal’s editorial process, the publication date, the language used, the presence or absence of citations — something concrete and verifiable.
Criterion standard: Briefly note what the criterion actually requires, so your reader understands the standard you are applying. “According to [source], credibility requires documented author expertise and publication in a peer-reviewed venue…”
External citation: Cite at least one external reference that defines the criterion, provides the evaluative standard, or corroborates your argument. The Cornell Library guide, Purdue OWL, or a course textbook on information literacy all work for this purpose.
Each criterion paragraph: 60–80 words minimum to make the argument substantiveThe Writer Credibility Reflection — The Part Most Students Underwrite
This part of the assignment is asking something specific: if you cited this source in a college paper or professional communication, what would that say about you? It’s a metacognitive question. You’re not evaluating the source anymore — you’re evaluating the relationship between the source’s quality and your reputation as a writer.
The reflection has two sub-questions baked in: Would this source be used in a college paper or professional communication? And why or why not? Answer both. Don’t just say “yes” or “no” — give the reasoning, and tie it back to the specific criteria you just evaluated.
How to Structure the Credibility Reflection
State your position clearly: Would you use this source in a college paper or professional communication? A one-sentence direct answer. Then explain it.
Connect to your evaluation findings: Your reflection should not introduce new information. It should draw directly from what your criterion evaluation showed. “Because my evaluation found strong credibility and accuracy, citing this source would strengthen my argument by associating my work with peer-reviewed, authoritative evidence.” Or, conversely: “Because my objectivity analysis revealed a commercial funding bias, citing this source without acknowledging that limitation could undermine my credibility as a writer by suggesting I did not critically examine my evidence.”
Distinguish college paper from professional communication: These are not the same context. A source might be appropriate in one and not the other. A detailed academic study might be too technical for a professional brief to a general audience — but perfect for an academic essay. Make that distinction if it applies to your source.
What “impacts your credibility as a writer” actually means: Readers judge writers by the sources they choose. A writer who cites Wikipedia loses credibility in a college paper. A writer who cites peer-reviewed research gains it. Your reflection should show you understand this relationship — not just that you know whether your source is good or bad.
Target 60–80 words for the reflection — enough to make the argument, not so much that it becomes its own essayAPA Format for Discussion Posts — What You Actually Need
The assignment specifies APA format. You need in-text citations throughout your post wherever you make a claim that draws on a source. And you need a reference list at the bottom with the full citation for every source you cited. This includes the source you are evaluating and any external sources you use to define your criteria.
▸ Journal article (in-text):
(Smith & Jones, 2022) | According to Smith and Jones (2022)…
▸ Journal article (reference list):
Smith, A. B., & Jones, C. D. (2022). Title of article in sentence case. Journal Name in Title Case, 45(3), 112–128. https://doi.org/xxxxxx
▸ Website or web page (in-text):
(World Health Organization, 2023) | (Cornell University Library, 2024)
▸ Website (reference list):
World Health Organization. (2023, October 12). Antibiotic resistance. https://www.who.int/news-room/fact-sheets/detail/antimicrobial-resistance
▸ Source with no individual author — use organization name:
(Centers for Disease Control and Prevention [CDC], 2024) → first mention; (CDC, 2024) → after that
▸ No date — use n.d.:
(National Institute of Health, n.d.)
Discussion Post APA — Two Things That Always Trip Students Up
- You need a reference list even in a discussion post. APA does not make exceptions for informal formats. End your post with “References” as a header and list every source cited.
- In-text citations go in the paragraph where you use the source — not only at the end of your post. If you describe your source’s publication in the summary paragraph, cite it there. If you reference a criterion definition, cite it in that paragraph.
Full Discussion Post Structure — Word by Word
Anatomy of a Strong Source Evaluation Discussion Post
Approximate word allocation for a 350–400 word post — the minimum done properly
Common Mistakes That Weaken This Post
| ❌ Mistake | Why It Costs Marks | ✓ Fix |
|---|---|---|
| Mixing the summary and evaluation together | The summary should be neutral — if you’re already evaluating in the summary, your structure is broken and the marker can’t assess each part cleanly | Write the summary first, stop. Then start a new paragraph for evaluation. Keep them separate, even if it feels slightly repetitive |
| Evaluating without citing evidence to prove your stance | The assignment specifically says “cite evidence to prove your stance” — opinion without evidence is not an evaluation, it’s a feeling | Every criterion paragraph needs at least one citation: one for the source you’re evaluating and one for the external standard you’re applying |
| Only choosing criteria where your source looks great | Posts that only praise are analytically thin — there’s no real argument being made | Pick at least one criterion where the source has a nuance, limitation, or genuine weakness — then argue it honestly |
| Skipping the writer credibility reflection entirely | The reflection is a required component — missing it loses points regardless of how good the rest is | After your three criteria, write a separate paragraph that directly answers: would I cite this in a college paper or professional communication, and why? |
| No reference list at the end | APA format requires a reference list — in-text citations without a reference list is incomplete APA | End every discussion post with a “References” heading and list all cited sources in APA format, including the source you evaluated |
| Confusing criteria — e.g., treating reliability and credibility as the same thing | If your evaluation of two criteria says essentially the same thing, you’ve misunderstood what they measure | Review the distinction before you write. Credibility is about author authority. Reliability is about consistent track record. Accuracy is about factual correctness. They overlap but they are not the same question. |
| Choosing a source with no clear author or date | Anonymous, undated sources give you very little to say on most criteria — and the APA citation becomes problematic | Pick a source with a clear author (or institutional author), a clear publication date, and a stable URL. This makes both your evaluation and your APA citation much cleaner |
Before You Submit — Quick Checklist
- Summary is neutral — no evaluation language
- Three distinct criteria evaluated in separate paragraphs
- Each criterion paragraph cites specific evidence from the source
- At least one external reference cited when defining a criterion
- Writer credibility reflection answers both sub-questions (college paper AND professional communication)
- Reflection connects reasoning to evaluation findings — not introduced from nowhere
- APA in-text citations throughout where sources are used
- Reference list at the bottom in correct APA format
- Post is at least 300 words