Cognitive-experiential self-theory (CEST) is a dual-process model of perception developed by . CEST is based around the idea that people operate using two separate systems for information processing: analytical-rational and intuitive-experiential. The analytical-rational system is deliberate, slow, and logical. The intuitive-experiential system is fast, automatic, and emotionally driven. These are independent systems that operate in parallel and interact to produce behavior and conscious thought.