This is a word known so well to many dogs that people will often spell it out to avoid having to say it. While it doesn't refer to a frequently experienced need on the part of a learner, it does allow the learner to express a thought they have about an important aspect of their life, and as such opens up opportunities for interaction. We have it here paired with POTTY, a related but distinct idea.
She uses it multiple times a day because she loves going for walks.
Go outside and walk around the neighborhood
"Walk"
Among our group of successful modelers, the following techniques were used successfully:
I would push the button before taking the learner for a walk.
If the learner pushed the button I would take the learner for a walk.
I pressed the button before putting on the learner's leash.
Among our group of successful modelers, the following seemed to be helpful:
In the beginning, taking the learner for a walk every time the learner pushed the button.
Taking a walk at a regularly scheduled time and at least once a day
Pointing to the button after it had been pressed
After letting the learner repeatedly request and get walk, there was a need to wean her off of the 6+ walks a day she was getting.
Recording the word was a challenge given how much it sounded similar to "want", so I had someone else record it so it would sound more distinctive.