For Distinguished Early Career Contribution to Psychophysiology: Award Address, 1985: A Triarchic Model of P300 Amplitude
Open accessAbstract
A model of P300 amplitude is proposed that reduces the many hypothetical constructs invoked to explain variations in P300 amplitude to three dimensions: 1) Subjective Probability, 2) Stimulus Meaning, and 3) Information Transmission. Evidence is presented to support the assertion that variables on the subjective probability and stimulus meaning dimensions have independent and additive contributions to overall P300 amplitude. The amplitude contributions of both of these dimensions, however, are modulated by a multiplicative relation with the proportion of transmitted stimulus information. Within each dimension, the fundamental experimental variables and their interrelations are specified. An example is presented to show how, by using an additive factors method, the respective amplitude effects of the probability and stimulus meaning dimensions can be separated. Supporting data are presented to show that the proposed model provides a reasonable and testable framework in which to conceptualize P300 results.
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P300 amplitude is proportional to the amount of attentional resources engaged in processing a given stimulus.
“and the amplitude of the P300 is proportional to the amount of attentional resources engaged in processing a given stimulus56.”
From The impact of multisensory integration and perceptual load in virtual reality settings on performance, workload and presence (2021) · cites this paper as [56]
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- Authors
- Johnson, R.
- Affiliations
- National Institutes of Health (US)
- Corresponding author
- Johnson, Ray
- Venue
- Psychophysiology
- Publisher
- Wiley
- Published
- 1986-07
- Volume
- 23
- Issue
- 4
- Pages
- 367-384
- ISSN
- 0048-5772 (ISSN-L)
- 1469-8986
- OpenAlex
- W1509900640
- Cited by
- 960
- References
- 4
- Citations by year
- 2026: 9 · 2025: 9 · 2024: 18 · 2023: 19 · 2022: 15 · 2021: 26 · 2020: 26 · 2019: 28 · 2018: 18 · 2017: 28 · 2016: 23 · 2015: 38 · 2014: 33 · 2013: 36 · 2012: 29
- FWCI
- 13.99
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Psychophysiology (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
- Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
- Life Sciences › Neuroscience › Cognitive Neuroscience › EEG and Brain-Computer Interfaces
- Keywords
- P300, P300 amplitude, subjective probability, stimulus meaning, information transmission, event-related potentials
- MeSH terms
- Arousal, Attention, Cerebral Cortex, Electroencephalography, Evoked Potentials, Humans, Reaction Time
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