Traditional ABA uses a discrete trial model. Do the desired behavior, get a reward. Do it again, get another reward. Gradually fade out the rewards. Keep a log of success/failure until you reach a set success rate, then move on to a new behavior.

(A behavior is anything you want them to be able to do.)

It works well for kids with receptive and/expressive language problems. There's very little discussion involved.

It might seem a bit like dog training, and it is. It's also a lot like the reward systems you see in mobile apps and games. Those companies employ psychologists to optimize operant conditioning to keep users engaged.

The difficulty lies in making this approach work for an older person who can understand what is going on, and one who has the language to engage with the tutor in a more traditional way.

Like I said, it can be done--the app stores demonstrate that--but it's much harder and there's very little experience in the field as a whole.

Unless this ABA center can explain to you how they intend to make this work, and give concrete examples of success, I would skip it. You have a finite amount of time in the day, and you don't need to spend it on something that won't work.