I m aware of the P300 with the three stimulus odd ball paradigm..Ample of literature evidence on standard, one target and a distractor (as in p3a, p3b paradigm) is available.... But my doubt is can one elicit P300 for multiple targets (say 3 targets and one standard) ...
Nisha. K. V
Junior Research Fellow
Department of Audiology
All India Institute of Speech and Hearing
Mysore.