As psions become aware of the flow of unreality around them, they gain the ability to sense it. This allows them to perceive active psionic abilities and anomaly. This feeling manifests as a sense of "wrongness", but the exact form it takes is highly variable. A few known options are:
Sensory Detection is when the sense takes the form of one of the five senses. A Psion who experiences this might associate a particular smell with anomaly, or taste pennies every time they draw themselves close to an active psion.- In extreme cases, they could even hear the sounds of thunder when triggered.
Sensory Interruption is when sensing the unreal hinders one of the five senses.- Vision going blurry, or even blinded, when seeing an anomaly, along with hearing ringing, getting goosebumps or growing numb.
Triggered Emotional Response is when the sensation of Psionics interferes or manipulates the brain chemistry in order to trigger an emotion- Anywhere from being marginally happier around it, to having an oncoming sense of dread, or even growing unnaturally calm.
Sixth Sense is a variety of Anomaly Detection that comes only from abilities that empower one's pre-existing ability. Any ability that gives one Sixth Sense is expected to specify how it manifests.