p214fig05.26 When a big enough mismatch occurs, the orienting system is activated and sends a burst of nonspecific arousal to the category level.  This Mismatch Detector has properties of the N200 ERP.<BR>||  Mismatch triggers nonspecific arousal.  Mismatch at F1 eleicits a nonspecific event at F2. Call this event nonspecific arousal.  N200 ERP Naatanen etal: 1. bottom-up, 2. unconditionable, 3. nonspecific, 4. mismatch