P300 from a single-stimulus paradigm: passive versus active tasks and stimulus modality

Author(s): Polich, J.

Journal/Book: Electroencephalogr Clin Neurophysiol. 1997; 104: 488-97.

Abstract: The P300 component of the event-related brain potential (ERP) was elicited with auditory and visual stimuli in separate experiments. Each study compared an oddball paradigm that presented both target and standard stimuli with a single-stimulus paradigm that presented a target but no standard stimuli. Subjects were instructed in different conditions either to ignore the stimuli, press a response key to the target, or maintain a mental count of the targets. For the passive ignore conditions, P300 amplitude from the single-stimulus paradigm was larger than that from the oddball paradigm. For the active tasks, P300 amplitude from the oddball paradigm was larger than that from the single-stimulus paradigm. For the press and count conditions, P300 amplitude and latency were highly similar for the oddball and single- stimulus procedures. The findings suggest that the single-stimulus paradigm can provide reliable cognitive measures in clinical/applied testing for both passive and active response conditions.

Keyword(s): Acoustic Stimulation. Adult. Comparative Study. Electroencephalography. Event-Related Potentials, P300/physiology. Evoked Potentials, Auditory/physiology. Evoked Potentials, Visual/physiology. Female. Human. Male. Photic Stimulation. Psychomotor Performance/physiology. Support, U.S. Gov't, P.H.S.

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