That was a very well-done report...
However, I've been reading a lot of conflicting advice regarding sleep...if the bird has enough sleep time during the day, the amount of night-time sleep shouldn't be as critical (provided it's not too short!). Birds that do not get enough day AND night-time sleep are another story...
...but I don't know how species specific sleep requirements are...
...another thing is to provide a lot of positive reinforcement to the bird when it's being quiet (and awake! ;-))...birds seem to react very positively to total silliness on our part...so sing a silly song (off-key is fine!), do a silly dance (like the chicken-dance)...and entertain your bird for being good...
...instead of only awarding them attention for screaming, just like you mentioned...