Parietal ERP: Expected vs. Unexpected

ODDBALL PARADIGM — Pz ELECTRODE — EVENT-RELATED POTENTIAL

In the oddball paradigm, rare deviant stimuli (~20%) are interspersed among frequent standard stimuli (~80%). The parietal P300 (P3b) is dramatically larger for unexpected targets — a hallmark of context updating in working memory.

Click any component label to explore its properties. References: Sutton et al. (1965) · Polich (2007) · ERP primer (NCBI)