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Speed of processing in the human visual system
Abstract
How long does it take for the human visual system to process a complex natural image? Subjectively, recognition of familiar objects and scenes appears to be virtually instantaneous, but measuring this processing time experimentally has proved difficult. Behavioural measures such as reaction times can be used, but these include not only visual processing but also the time required for response execution. However, event-related potentials (ERPs) can sometimes reveal signs of neural processing well before the motor output. Here we use a go/no-go categorization task in which subjects have to decide whether a previously unseen photograph, flashed on for just 20 ms, contains an animal. ERP analysis revealed a frontal negativity specific to no-go trials that develops roughly 150 ms after stimulus onset. We conclude that the visual processing needed to perform this highly demanding task can be achieved in under 150 ms.
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“Thus, a natural paradigm for comparing the performance of human observers in an object-recognition task to that of a feedforward model of visual processing is ultra rapid categorization, a task for which back projections are likely to be inactive (30, 31).”
From A feedforward architecture accounts for rapid categorization (2007) · cites this paper as [30]
In the citing paper
“The accuracy of the human observers is well within the range of data previously obtained with go/no-go tasks on similar tasks (30, 31, 33).”
From A feedforward architecture accounts for rapid categorization (2007) · cites this paper as [30]
In the citing paper
“A well established experiment is an animal- vs. non-animal-recognition task (30-34).”
From A feedforward architecture accounts for rapid categorization (2007) · cites this paper as [30]
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Metadata
- Authors
- Thorpe, S., Fize, D., & Marlot, C.
- Affiliations
- Centre de recherche cerveau et cognition (FR)
- ORCID
- Thorpe, Simon
- Venue
- Nature
- Published
- 1996-06
- Volume
- 381
- Issue
- 6582
- Pages
- 520-522
- ISSN
- 0028-0836 (ISSN-L)
- 1476-4687
- OpenAlex
- W2091845343
- Cited by
- 3,538
- References
- 0
- Citations by year
- 2026: 97 · 2025: 121 · 2024: 127 · 2023: 116 · 2022: 117 · 2021: 149 · 2020: 147 · 2019: 151 · 2018: 172 · 2017: 165 · 2016: 143 · 2015: 155 · 2014: 169 · 2013: 157 · 2012: 174
- FWCI
- 20.22
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- www.springer.com/tdm (tdm)
- Locations
- Nature (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
- Life Sciences › Neuroscience › Cognitive Neuroscience › Face Recognition and Perception
- Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
- Keywords
- visual processing speed, event-related potentials, go/no-go task, frontal negativity, object classification, natural scene recognition, reaction time
- MeSH terms
- Adult, Evoked Potentials, Visual, Female, Humans, Male, Middle Aged, Reaction Time, Vision, Ocular
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