Your brain decides a scene is “wrong” in about 300 milliseconds — long before you can say why.

That’s the part that matters for safety. The “gut feeling” a supervisor gets walking onto a job — the sense that something is off before they can point at it — isn’t mysticism. It’s the brain flagging a mismatch faster than language can catch up. And the reverse is just as important: once a hazard becomes part of the expected scene, the signal stops firing. Normalization of deviance isn’t a culture problem first. It’s a perception problem first. In this video: • What the N300 actually is, in plain language • Why your brain evaluates a scene before you consciously “decide” anything • How this shapes hazard recognition, walkdowns, and field observations • Why experienced people stop seeing the thing they’ve walked past 400 times • What leaders can do to interrupt the pattern Psychology Before Procedures. People Before Paperwork.™ #WorkplaceSafety #SafetyLeadership #Neuroscience #HumanFactors #HazardRecognition #SafetyCulture #SafetySense