Wendy and Kermit obviously found it beneficial, take a look.
...EDITED…
Dear Lutino,
Your posts have been edited as they only appear to be a spam attempt.
Furthemore, the only behavioral and training methods supported by the WPT are those based on creating a relationship based on trust and respect for the psychological needs of parrots, and not the ‘quick fix’ strategies which are not beneficial for parrots and do not achieve the same goals.
All best,
Cristiana