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Related Experiment Video

Updated: Jun 20, 2026

The 5-Choice Serial Reaction Time Task: A Task of Attention and Impulse Control for Rodents
09:43

The 5-Choice Serial Reaction Time Task: A Task of Attention and Impulse Control for Rodents

Published on: August 10, 2014

Caffeine modulates attention network function.

Tad T Brunyé1, Caroline R Mahoney, Harris R Lieberman

  • 1US Army Natick Soldier Research, Development and Engineering Center, United States. tbruny01@tufts.edu

Brain and Cognition
|September 8, 2009
PubMed
Summary
This summary is machine-generated.

Caffeine enhances visual attention networks, improving alerting and executive control in a dose-dependent manner. Higher doses may slightly impair orienting, suggesting complex interactions with brain neurotransmitters.

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Measurement of Neurophysiological Signals of Ignoring and Attending Processes in Attention Control
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Measurement of Neurophysiological Signals of Ignoring and Attending Processes in Attention Control

Published on: July 5, 2015

Related Experiment Videos

Last Updated: Jun 20, 2026

The 5-Choice Serial Reaction Time Task: A Task of Attention and Impulse Control for Rodents
09:43

The 5-Choice Serial Reaction Time Task: A Task of Attention and Impulse Control for Rodents

Published on: August 10, 2014

Measurement of Neurophysiological Signals of Ignoring and Attending Processes in Attention Control
09:37

Measurement of Neurophysiological Signals of Ignoring and Attending Processes in Attention Control

Published on: July 5, 2015

Area of Science:

  • Neuroscience
  • Cognitive Psychology

Background:

  • Visual attention is crucial for information processing.
  • Caffeine is a widely consumed stimulant with known effects on cognitive function.
  • Posner's model outlines three distinct visual attention networks: alerting, orienting, and executive control.

Purpose of the Study:

  • To investigate the dose-dependent effects of caffeine on the three visual attention networks.
  • To explore the relationship between caffeine, adenosine, and dopamine in attention-related brain areas.

Main Methods:

  • A placebo-controlled, double-blind, repeated-measures study design.
  • Participants completed a flanker task assessing alerting, orienting, and executive control.
  • Caffeine doses administered: 0mg, 100mg, 200mg, and 400mg.

Main Results:

  • Caffeine improved alerting and executive control functions in a dose-response manner, peaking at 200mg.
  • These improvements align with caffeine's known effects on dopamine in relevant brain regions.
  • Higher caffeine doses showed a trend towards less efficient orienting to cued locations.

Conclusions:

  • Caffeine exerts differential effects on visual attention networks based on dosage.
  • Findings support the role of caffeine, adenosine, and dopamine interactions in mediating visual attention.
  • Results have implications for understanding stimulant effects on cognitive processes.