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Side-by-side examples of the same ideas written in passive and active voice — and why active reads stronger in academic argumentation.
Passive voice isn't always wrong. There are specific academic contexts where it's appropriate or even preferred.
When who performed the action doesn't matter or isn't known, passive is appropriate.
Lab reports and methods sections traditionally use passive to keep focus on the procedure, not the researcher.
When what happened to the object matters more than who did it, passive puts the focus correctly.
When describing widely accepted findings where attributing to a specific agent would be misleading.
Common passive patterns found in student essays and their active voice equivalents.
| Passive (Flag) | Active (Fix) | What Changed |
|---|---|---|
| "The study was conducted by Smith." | "Smith conducted the study." | Agent moved to subject |
| "It was found that inflation increased." | "The data show that inflation increased." | Removed empty "it was found" |
| "The essay was written in a formal style." | "The author wrote the essay in a formal style." | Named the agent explicitly |
| "These conclusions were reached by the team." | "The team reached these conclusions." | Inverted agent + object |
| "The hypothesis was supported by the results." | "The results supported the hypothesis." | Results become active subject |
| "It is argued by scholars that…" | "Scholars argue that…" | Removed "it is argued by" |
Passive voice in academic writing is one of those issues that's hard to self-diagnose. Individual passive sentences often sound fine in isolation — formal, even authoritative. The problem accumulates across a full essay. When a third or more of your sentences are passive, the writing begins to feel evasive: things happen, conclusions are reached, results are found — but nobody does anything. The reader senses a lack of argumentative commitment, even if they can't name exactly why.
Professors and academic editors who review a lot of student writing recognize passive overuse quickly. It's associated with hedging, with writers who aren't confident enough in their own argument to claim it directly. Shifting to active voice forces you to be explicit about who claims what and on what basis — which is exactly what academic argumentation requires.
Passive voice is technically a grammatical structure, not a style flaw in itself. The problem is what it signals about the rest of your writing. A passive sentence that's appropriate in a methods section is fine. A passive sentence that's hiding a weak argument or avoiding a clear claim is not. The checker identifies the pattern — but understanding why each flagged sentence is passive helps you make better decisions about which ones to fix and which ones to keep.
The practical goal isn't to eliminate passive voice entirely — it's to make sure every passive construction in your essay is there by choice, not by habit. Most student writing has 30-40% passive voice when written quickly. Getting that down to 15-20% typically produces a noticeably clearer, more authoritative essay without changing any of the underlying arguments.
The appropriate level of passive voice varies significantly by discipline and document type. Understanding the norms for your specific type of writing helps you know what threshold to target.
These benefit most from active voice. The whole point of an argumentative essay is that you are making a claim and defending it. Passive voice distances you from that claim. Aim for under 15% passive in argumentative writing.
The methods section is traditionally written in passive voice — this is a discipline-specific convention that the checker accounts for. Results and discussion sections, however, are often written more actively in modern scientific writing. Aim for under 30% overall, with higher tolerance in methods sections specifically.
When discussing what other scholars argue or found, passive voice is common and acceptable. When presenting your own synthesis or interpretation, active voice is stronger. A mixed approach is appropriate; aim for under 25% overall.