Keen Observer

Prerequisites: Sense Motive

Whenever you interact with a creature under a mental effect for at least 1 minute, the GM attempts an automatic secret Sense Motive check for you without your expertise die. On a success, you learn about the mental effect. If you specifically request a Sense Motive check to sense mental effects, you can attempt a Sense Motive check as normal, including your expertise die, in addition to this automatic check.