Do you mind explaining the bluffing behaviour? I can't remember if it was you or someone else who posted an article about it. I didn't really understand, is it bluffing the aggression?
Bluffing usually refers to when your bird looks like it is about to bite - this can include a variety of behaviors, like lunging, aggressive posturing, biting in your direction without making skin contact, flaring up, screaming, etc. Some species of parrots are well known for going through a "bluffing phase", usually during adolescence when they are around 6 months to a year old. This phase can last for a few weeks or months and it typically seems to resolve spontaneously as the bird matures (unless it doesn't, of course). Sometimes bluffing evolves into nipping and nipping evolves into biting and biting can become a habitual behavior.
The general idea with bluffing is that the bird is threatening to bite, but if you "call the bluff" by ignoring the threat, then the bird will eventually figure out that it isn't working and stop this behavior. Sometimes people compare it to a rebellious teenage that is acting out and testing boundaries.
Personally, I think this is a misrepresentation of the situation and BAD advice for new parrot owners. Most birds do not bluff. They look like they are about to bite as a warning ... that they are about to bite you! They might hold back out of fear or reluctance, but they are not trying to trick or mislead you with their behavior. They are (desperately) attempting to communicate with you that something is not okay from the bird's perspective. Ignore this at your peril.
If the bird does bite you, rather than ignoring the bite, you should aim to prevent the bite from even happening, by giving the bluffing bird some space and analyzing the situation for aggression triggers. If you can't stop the bite from happening, then you should aim to ignore the BIRD, rather than trying to not react to the bite - A verbal correction followed by a short period of social distancing. This tends to be an effective way to get your point across, assuming your parrot enjoys interacting with you under normal circumstances.
It is worth mentioning that "bluffing" can also become a game for some parrots. These birds really WILL fake you out and intentionally lunge at people to see if they jump. Their body language reveals that they are playing around instead of acting out of angry or fear. Parrots are quite smart and some parrots have a surprisingly twisted sense of humor!
But I don't think that this is true for the majority of "bluffing" parrots and I think it is unwise to playing chicken with a biting parrot. You will probably lose.