: Why do many manuals and technical documents seem to prefer passive voice? It seems like many manuals and technical documents prefer passive voice over active voice. Is this true, or is it just

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I can add that more than a decade ago, I was senior tech writer with an engineering & manufacturing firm whose product was used in semiconductor fabs, and when I started, the vast preponderance of their tech docs were littered with egregious passive voice, as well as massive redundancies and an over-reliance on repeated heavily-bolded all caps warnings where there were use-case risks.

I found, after discussion with the heads of Document Control and Engineering that this was a result of the one class each engineer had been required to take in tech comms during university - and that independently, at no less than ten top-flight US engineering programs, these student were taught that passive voice would somehow help them magically evade liability and responsibility should an enduser be harmed in the use of their product.

Needless to say, this is a baseless belief, belied by both competent writing and many years of case precedent, and once I presented studies, and brought in a risk-specialist attorney to explain this, we shifted language.

Old:

"Should an incompatible gas be flowed through this purifier's getter bed, an uncontrollable runaway exothermic reaction may occur, with risk of harm to nearby persons or property. When facilitizing this unit, confirm gas compatibility."

New:

"Caution: this purifier may explode or catch fire if the wrong gas is flowed through the getter bed. Double-check for correct gas to purifier chemistry at installation and again prior to flowing gas."

I suspect that though this was more than a decade and a half ago, the same thinking may still apply.

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Speaking only from my own experience, passive voice is often a last resort. I write a lot of user guide material, and my company's style guide discourages using passive phrasing, but even more strongly discourages using second-person pronouns. So while it may feel more natural for me to write "You can access the setting in the widget," I may have to use "The setting can be accessed in the widget" instead, assuming I can't figure out another way around it.

I suspect this is true of other widely-used style guides as well.

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In academic writing, scientific papers and similar, it is normal practice to avoid writing in the first person. Such documents are written in the third person. Check the writing style guide of any scientific journal for confirmation of this.

This practice carries through to a large number of technical communications. When writing in the third person, the passive voice becomes more natural. There is a tendency to follow on from:

The system does x

to

The system is affected by x

rather than

x affects the system

This tendency doesn't make the use of passive correct or preferred. It is just a common tendency among some writers.

It would be recommended to continue to use the general principle of minimising the use of the passive voice.

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