Thanks. I'd never heard of closet talkers. My parrot will make other noises in my presence like bark or the beeping of the microwave. It's just the human words that it won't do when I'm there.
Dr. Pepperberg's method is modelling. She will have a human assistant help her. She will say a word, then the human assistant will repeat. Then there is an exchange of some commodity, food or toy. When the human doesn't repeat correctly, the human is told "no" and ignored until the correct response is given. The exchange it bilateral. The assistant will also make requests of the Dr. and give her a treat or "punish" her for the incorrect response. The bird learns by modelling this exchange between Dr. P and her assistant. Thus I thought I could use the toy as my "assistant". As we all know, it takes dedication to train our parrots and it's not always easy to find an assistant to help you multiple times a day for these training sessions.
Below is a video of her demonstrating her training method.