Combat Manifestation
( Expanded Psionics Handbook, p. 44)[Psionic]
You are adept at manifesting powers in combat.
Prerequisite
Benefit
You get a +4 bonus on Concentration checks made to manifest a power or use a psi-like ability while on the defensive (see Manifesting Powers on the Defensive, page 54) or while you are grappling or pinned.