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P300, stimulus intensity, modality, and probability. 1996

J Polich, and P C Ellerson, and J Cohen
Department of Neuropharmacology TPC-10, Scripps Research Institute, La Jolla, CA 92037, USA. polich@scripps.edu

Auditory and visual stimulus intensity were manipulated factorially with target probability to assess the influence of these variables on the P300 component of the event-related brain potential (ERP). Increases in stimulus intensity produced reliable increases in P300 amplitude and decreases in peak latency for both modalities that were additive with target stimulus probability effects. Similar, somewhat weaker stimulus intensity effects also were observed for the N100, P200, and N200 components. The findings suggest that stimulus intensity contributes to both P300 amplitude and latency measures in important ways and are discussed in relation to the use of ERPs in applied contexts.

UI MeSH Term Description Entries
D008297 Male Males
D010775 Photic Stimulation Investigative technique commonly used during ELECTROENCEPHALOGRAPHY in which a series of bright light flashes or visual patterns are used to elicit brain activity. Stimulation, Photic,Visual Stimulation,Photic Stimulations,Stimulation, Visual,Stimulations, Photic,Stimulations, Visual,Visual Stimulations
D011597 Psychomotor Performance The coordination of a sensory or ideational (cognitive) process and a motor activity. Perceptual Motor Performance,Sensory Motor Performance,Visual Motor Coordination,Coordination, Visual Motor,Coordinations, Visual Motor,Motor Coordination, Visual,Motor Coordinations, Visual,Motor Performance, Perceptual,Motor Performance, Sensory,Motor Performances, Perceptual,Motor Performances, Sensory,Perceptual Motor Performances,Performance, Perceptual Motor,Performance, Psychomotor,Performance, Sensory Motor,Performances, Perceptual Motor,Performances, Psychomotor,Performances, Sensory Motor,Psychomotor Performances,Sensory Motor Performances,Visual Motor Coordinations
D004569 Electroencephalography Recording of electric currents developed in the brain by means of electrodes applied to the scalp, to the surface of the brain, or placed within the substance of the brain. EEG,Electroencephalogram,Electroencephalograms
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000161 Acoustic Stimulation Use of sound to elicit a response in the nervous system. Auditory Stimulation,Stimulation, Acoustic,Stimulation, Auditory
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D018913 Event-Related Potentials, P300 A late-appearing component of the event-related potential. P300 stands for a positive deflection in the event-related voltage potential at 300 millisecond poststimulus. Its amplitude increases with unpredictable, unlikely, or highly significant stimuli and thereby constitutes an index of mental activity. (From Campbell, Psychiatric Dictionary, 6th ed) Evoked Potentials, P300 Component,P3 Event Related Potential,P300 Event-Related Potential,P300 Event-Related Potentials,Event-Related Potentials, P3,P3 Event-Related Potentials,P300 Component,P3a Event-Related Potentials,P3b Event-Related Potentials,Event Related Potentials, P3,Event Related Potentials, P300,Event-Related Potential, P3,Event-Related Potential, P300,Event-Related Potential, P3a,Event-Related Potential, P3b,Event-Related Potentials, P3a,Event-Related Potentials, P3b,P3 Event Related Potentials,P3 Event-Related Potential,P300 Components,P300 Event Related Potential,P300 Event Related Potentials,P3a Event Related Potentials,P3a Event-Related Potential,P3b Event Related Potentials,P3b Event-Related Potential

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