You cannot hand a buzzer to someone who is at home. That is the whole problem, and there are four ways around it: the client's own phone, tappers the client owns, self-administered tapping, or someone in the room with them. Each one trades something.

The short version of the trade: phone vibration is the closest thing to the in-room experience and depends on their handset behaving; client-owned tappers work well and cost the client money; self-administered tapping is free, available immediately, and changes the task; a second person in the room is almost never appropriate.

Worth saying plainly before any of that — tactile is not required. Sound alone is a complete modality and reaches every client with a pair of earbuds. Reach for tactile when there is a reason: a client who closes their eyes, a client screened out of visual stimulation, a client who used buzzers with you in the room and misses them.

Can the client's phone do it?

Sometimes, and it is the option worth trying first because the hardware is already in their hand.

Some stimulation tools can drive the vibration motor in a phone in time with the rest of the stimulus, one phone per hand if the client has two devices. What varies is how the phone gets connected and whether anything has to be installed — which matters, because a client who has to install something before a trauma session sometimes doesn't have a session at all.

Two things to check before you rely on it in a reprocessing session:

• Whether the taps stay with the rest of the stimulus. A phone running its own rhythm alongside the visual is two stimuli, not one.

• How it behaves on the client's specific phone. Vibration handling differs between handsets and between operating systems, and low-power modes suppress it.

Test it in a session where nothing is being reprocessed. That is true of every mechanism here, and most true of this one.

Should the client buy tappers?

For a client doing sustained trauma work, it is a reasonable thing to raise. Handheld pulsers are the in-office standard for a reason, and a client who owns a pair has something that works every session without setup.

What to be careful about is the ask. You are recommending a purchase for a therapy that is already expensive, to a person whose distress is what brought them to you.

So know the rough number before you raise it. A self-contained handheld set — the controller and the two pulsers, which together are what a client actually needs — runs somewhere around US$130 to US$210 at the makers' own published prices. The makers are American and they publish in US dollars, so a Canadian client pays that plus exchange, plus shipping, and sometimes plus duty at the door. Check the current figure on the maker's own page before you quote one, because it is their money and a half-remembered number is worse than none.

Two things are worth knowing before you point someone at a site. Some makers prepay Canadian duty so the price at checkout is the price that lands, and some leave the client to settle it with the courier — a real difference in what arrives on the doorstep. And the cheap listings, the ones well under a hundred dollars, are almost always replacement pulsers, which do nothing without the controller they plug into. A client who buys those has bought a cable.

Frame it as optional and let it come from them where possible. Clients who have already used buzzers with you in the room will often raise it themselves once they notice what is missing.

Does self-administered tapping work?

It is the option with no cost and no setup, and it is genuinely used. The butterfly hug, alternating knee taps, alternating hand taps on the thighs — the client provides the alternation themselves while you pace it verbally or they follow the rhythm of a visual or auditory stimulus.

The honest cost is that it is a different task. The client is now doing something rather than receiving something, which adds a small load and moves part of the pacing onto them. Some clients find that grounding. Others find that their tapping speeds up as distress rises, which is worth watching for and worth naming.

Practically:

• Pace it out loud for the first few sets so the rhythm is yours, not theirs.

• Watch the hands. Accelerating taps, taps that stop, taps that get harder — all clinical information you would not have with a buzzer.

• Check afterwards whether the tapping itself was intrusive. For some clients the physical self-touch is the wrong thing at the wrong moment.

What about someone else tapping for them?

Almost never. It means a third person in the room during trauma reprocessing, usually a partner or a parent, which changes what the client can say and what they will allow themselves to feel. It also puts a person with no training in the position of pacing a clinical intervention.

There are narrow exceptions in work with children, where a caregiver's involvement is already part of the treatment. Outside that, if the tactile modality needs a second person, use sound.

When should I just use sound?

More often than most practitioners expect.

Sound requires only earbuds, works on every device, carries no photosensitive risk, and does not require the client to manage anything. If the reason you want tactile is "the visual isn't right for this client," sound covers that completely.

Reach past sound to tactile when the client specifically responds to it, when they used buzzers with you in person and the absence is noticeable, or when they are someone who dissociates and physical input helps them stay in the room. Those are real reasons. "It seems more thorough" is not.

What about safety?

Tactile stimulation carries no photosensitive-seizure risk, which is exactly why it is the fallback when visual is contraindicated. Sound is the other.

The care points are different ones. A client with chronic pain, a recent hand or wrist injury, or a trauma history involving being touched or held may experience alternating physical input very differently from how you intend it. Ask before the first tactile set rather than after it.

The short version

Try the phone in their hand first, keep sound as the modality that always works, and treat self-administered tapping as a real option rather than a compromise — as long as you pace it and watch the hands. Whatever you choose, run it once in a session with nothing at stake before you run it in one with everything at stake.

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