Question

1) Since self-inflicted confusion has a BP of 40, is there any STAB of some sort?
2) What type is self-inflicted confusion?
3) Since self-inflicted confusion has a BP of 40, does it get boosted by Technician?

Answer 1

It has no type. This means it does not gain STAB. And it does not get boosted by Technician.

The damage is done as if the Pokémon attacked itself with a 40-power typeless physical attack.

http://bulbapedia.bulbagarden.net/wiki/Confused#Confusion

The effect does not apply to confusion damage, which remains at a base power of 40.

http://bulbapedia.bulbagarden.net/wiki/Technician_(Ability)