Subjective and objective probability effects on P300 amplitude revisited
| Autor: | J. Peter Rosenfeld, Kyle M. Smith, Melissa J. Kleschen, Julianne R. Biroschak |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Adult
Male medicine.medical_specialty Cognitive Neuroscience Experimental and Cognitive Psychology Audiology Stimulus (physiology) Developmental Neuroscience Event-related potential medicine Humans Biological Psychiatry Probability Endocrine and Autonomic Systems General Neuroscience Electroencephalography Cognition P300 amplitude Event-Related Potentials P300 Electrooculography Neuropsychology and Physiological Psychology Neurology Visual Perception Female Psychology Social psychology Photic Stimulation Psychomotor Performance Objective probability |
| Zdroj: | Psychophysiology. 42:356-359 |
| ISSN: | 1469-8986 0048-5772 |
| DOI: | 10.1111/j.1469-8986.2005.00283.x |
| Popis: | Does objective probability affect P300 size independently and in addition to subjective probability? The latter was manipulated by the number of stimuli presented and classification task. Five groups saw target and frequent stimuli. Two saw these with p 5 .2 or .067, with two different button presses. Three groups saw two additional nontarget stimuli each with p 5 .067. One group pressed a different button for each stimulus. A second group pressed one button for the three oddballs, another for the frequent. A third critical group pressed one button for the target and another for other stimuli. In this group, P300 was larger for targets versus nontargets, and larger for nontargets versus frequents. Although nontargets were classified with frequents, their actual low probability distinguished them from frequents, and their subjective probability distinguished them from targets. Therefore, actual and subjective probability effects were independently found. Descriptors: Event-related potential, P300 amplitude, Subjective probability, Stimulus classification |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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