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Updated: Jul 14, 2026
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Measuring Attention and Visual Processing Speed by Model-based Analysis of Temporal-order Judgments
Published on: January 23, 2017
Voluntary attention changes the speed of perceptual neural processing
Yasuki Noguchi1, Hiroki C Tanabe, Norihiro Sadato
1Department of Integrative Physiology, National Institute for Physiological Sciences, Myodaiji, Okazaki, Japan. noguchi@nips.ac.jp
The European Journal of Neuroscience
|June 15, 2007
Summary
Spatial attention speeds up perceptual neural activity in the brain, showing both increased neural intensity and faster neural responses. This neural acceleration, not enhancement, correlates with faster behavioral responses, revealing attention's temporal dynamics.
Area of Science:
- Cognitive Neuroscience
- Neuroimaging
- Visual Perception
Background:
- Psychological studies show faster human responses to attended stimuli.
- Previous electroencephalography (EEG) and magnetoencephalography (MEG) lacked spatial resolution to study neural speed.
- Attentional modulation is prominent in the higher visual cortex.
Purpose of the Study:
- To investigate if attention accelerates perceptual neural activity speed.
- To bridge the gap between psychological and neurological findings on attention.
- To demonstrate the temporal dynamics of attentional modulation.
Main Methods:
- Combined magnetoencephalography (MEG) with a novel stimulus-presentation technique.
- Focused on neural signals from the higher visual cortex.
- Utilized a Posner paradigm to assess behavioral facilitation.
Main Results:
- Spatial attention increased neural intensity (enhancement) and decreased neural latency (acceleration).
- Neural acceleration, not enhancement, correlated with attention-induced behavioral facilitation.
- Demonstrated temporal dynamics of attentional modulation in neural activity.
Conclusions:
- Attention accelerates perceptual neural activity speed in the human brain.
- Neural latency changes (acceleration) are key to attention's behavioral effects.
- Provides novel insights into the temporal dynamics of attention.
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