Lie Detector Feat 4
Source Pathfinder Advanced Player's Guide
Prerequisites empiricism or interrogation methodology
You're adept at noticing the tells of a liar - sweat, flushing, a quavering voice, a quickening pulse.
You gain a +1 circumstance bonus to Perception checks to Sense Motive and to Perception DCs against attempts to Lie to you.
When you determine someone is lying to you, you can use their deceit to your advantage to gain a +1 circumstance bonus to the next Deception, Diplomacy, Intimidation, or Performance check you attempt against that creature within the next minute.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
InvestigatorThis indicates abilities from the investigator class.