This issue is about a calendar nobody is in charge of. The vocabulary works the same way. There is no office that hands out the words for the chair we sit in, so every country that built one built its own.

The first time I heard someone say “involvement” instead of “engagement,” I assumed it was a British accent doing what British accents do to American words.

It was not. It was a different job.

The same chair, four names

Ask four national funders what to call a person with lived experience (PWLE) working on a research team and you will get four answers.

• In the United States, the word is engagement. The Patient-Centered Outcomes Research Institute (PCORI) builds its requirements around engaging patients and other stakeholders as partners.
• In the United Kingdom, the word is involvement. The National Institute for Health and Care Research (NIHR) calls it public involvement, or patient and public involvement (PPI).
• In Canada, it is patient-oriented research. The Canadian Institutes of Health Research (CIHR) launched its Strategy for Patient-Oriented Research (SPOR) in 2011 and defines it as a continuum of research that engages patients as partners and focuses on patient priorities.
• In Australia, the word is consumer. The National Health and Medical Research Council and the Consumers Health Forum of Australia issue a joint Statement on Consumer and Community Involvement in Health and Medical Research — first in 2002, updated in 2016, and replaced by a new Statement in 2026.

None of those is a translation error. Each one carries a history, and each one carries an assumption about what you are for.

The Australian entry moved while I was writing this. Their 2016 Statement was replaced by a new one in 2026. That is not a footnote — it is the argument.

The newest American entry makes the point better than I can. In November 2025 the National Institutes of Health (NIH) published the report of its ENGAGE working group — Engaging the Public as Partners in Clinical Research. Partners. Shaping the work. Sharing decisions. By the definitions in the next section, that is involvement. We call it engagement because engagement is the word we have.

The distinction that actually helps

The sharpest tool in this whole vocabulary belongs to the NIHR, and I think every American advocate should carry it.

The NIHR splits three words that we tend to use interchangeably.

Read that again with an American ear.

The word we built our whole practice around is the one they use for publicity.

I do not say that to score a point. American engagement, as PCORI means it, is much closer to British involvement than to British engagement. But if you walk into an international meeting saying you do engagement work, half the room may hear that you do outreach.

The words for us

The names for the person in the chair have multiplied too, and they are not neutral either.

• Patient partner — common in the United States and Canada. Names a relationship, not a diagnosis.
• Public contributor — NIHR usage. Notably does not say patient at all.
• Consumer — Australian usage. Borrowed from consumer rights, which is where a good deal of its force comes from.
• Expert by experience — common in mental health and social care. States the claim plainly.
• Service user — British, and contested. Some people find it clinical; others prefer it to patient precisely because it names a transaction.
• Person with lived experience — what we use here. The NIHR reaches for it too, and is explicit that it includes people with lived experience of a condition whether or not they are currently patients. That is the point of the phrase: it does not expire when your treatment does.

Every one of those words is an argument about what you bring to the table. Consumer says you have rights. Expert by experience says you have knowledge. Patient says you have a condition.

What to ask when a new word turns up

You do not need to memorise the map. You need four questions, and they work in any dialect.

• What decisions am I in the room for, and which ones are already made?
• Am I advising, or am I deciding? If advising, who decides, and do I get to see what they did with the advice?
• Is this in writing anywhere — a role description, a terms of reference, a line in the grant?
• What is the compensation, and who pays it?

The answers tell you which word they are really using, whatever word they said.

For the other chair

If you are the researcher reading this, there is one thing worth doing before your next team meeting.

Write down which word your project uses and what you mean by it. One paragraph. Put it in the protocol, the role description, and the first email to anyone you invite.

Most of the confusion I have watched is not disagreement. It is two people using the same word for different jobs and neither one checking.

The line underneath all of it

There is a reason the vocabulary keeps multiplying, and it is not that anyone is being careless.

Every new word is an attempt to describe a relationship that has not settled yet. When the arrangement is genuinely unequal, the language keeps reaching for a term that sounds better than the last one.

So the words will keep changing. What you should test is not the word.

Engagement is an invitation to advise. Empowerment is holding a real vote.

Ask which one is on offer. The answer will not change because the word did.

The months on the calendar are renewed one statehouse at a time. The words for us are renewed one funder at a time. Neither was handed down, and neither is finished.

— Tom