I can't seem to find it stated anywhere in the rule book so i must have over looked it. Can a character select Psycic Powers from more than one discipline?

It makes very little sense to me we you shouldbe be able to as there is very little incentive to staying within one discipline (except for mastery, which is still cool).

So what sayith the forum?

When you gain (purchase with xp) a new psy rank you have the option of gaining new powers from a discipline you already know, or gain another discipline. The details are on the Traits section under the various Psy Rank traits.

And there is a small incentive to keep on your current Discipline... If you know ten or more powers you gain a discount when trying to invoke them.

Discipline Mastery is quite the incentive. It drops the PT of all associated powers by 5. That's a pretty huge bonus, especially for the more difficult powers to manifest.

When you branch out into a new discipline, you only get one power for that psy-rating, I worked out the math on a different thread, and, if I recall, it isn't even possible for one on the savant-warrant path to branch out and also attain discipline mastery.

Ac4189 said:

Read Psy Rating 4 in the talents section. There is an opportunity to buy Disciplines outside your chosen path. However, as was stated, there is a huge incentive to buy up to 10 powers inside your Discipline (-5 to all PT's is gigantic)

Crow, the way I see it, on the Savant path you're giving up a little psy power to get more direct combat talents and skills. If you go the Scholar route you can reasonably expect to have your required 10 powers sometime inside Scholar Obscurus.