Source: Psionics Handbook
Your knowledge of the mind gives you influence with others.
Prerequisite: Cha 13
Benefit: You get a +2 bonus on all Diplomacy, Bluff, and Intimidate checks against living humanoids with an Intelligence score of 4 or higher. You get the same +2 bonus on Charisma checks used to influence or interact with living humanoids having an Intelligence score of 4 or higher.