Cited by 53Neurotransmitter Receptor Influence on BehaviorNeural and Behavioral Psychology StudiesSubstance Abuse Treatment and Outcomes

Effects of d-amphetamine in human models of information processing and inhibitory control

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Fillmore, Mark T., Kelly, Thomas H., Martin, Catherine A.·2005·Drug and Alcohol Dependence

Abstract

Although stimulants are generally associated with enhanced information processing, reports of stimulant effects on behavioral functions that rely on inhibitory processes have been inconsistent. The present research tested the joint effects of d-amphetamine on information processing and inhibitory control in healthy adults (N = 22) with no reported history of illicit stimulant use or drug dependence. Information processing was measured by a rapid information processing (RIP) task and inhibitory control was measured using a stop-signal task. Performance was measured in response to 15 mg/70 kg, 7.5 mg/70 kg, and 0 mg/70 mg (placebo) doses of d-amphetamine, administered double-blind in a randomized, within-subjects design. Results showed that d-amphetamine improved information processing in a dose-dependent manner. By contrast, no enhancement of response inhibition was observed. Stimulant effects were also observed in physiological and subjective effects measures. The findings indicate that a stimulant drug can enhance aspects of cognitive functioning without producing a concomitant improvement in inhibitory control of behavior. The findings highlight the complex nature of stimulant effects on human behavior and the utility of performance tasks as models of complex behavioral and cognitive functions.

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Cited by

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Authors
Fillmore, M. T., Kelly, T. H., & Martin, C. A.
Affiliations
University of Kentucky (US)
Corresponding author
Fillmore, Mark T.
Venue
Drug and Alcohol Dependence
Publisher
Elsevier BV
Published
2005-02
Volume
77
Issue
2
Pages
151-159
ISSN
0376-8716 (ISSN-L)
OpenAlex
W2054112911
Cited by
53
References
4
Citations by year
2026: 1 · 2025: 2 · 2024: 2 · 2023: 1 · 2022: 2 · 2021: 3 · 2019: 1 · 2018: 2 · 2015: 4 · 2014: 2 · 2013: 2 · 2012: 3
FWCI
1.64
Type
journal article
Language
en
Open access
Locations
  • Drug and Alcohol Dependence (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • University of Kentucky
  • National Institute on Drug Abuse (R01 DA14079, P50DA005312, R01DA014079)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
  • Health Sciences › Medicine › Epidemiology › Substance Abuse Treatment and Outcomes
Keywords
d-amphetamine, stimulants, information processing, inhibitory control, response inhibition, stop-signal task, dose-dependent effects, subjective effects, physiological effects, healthy adults
MeSH terms
Adolescent, Adult, Analysis of Variance, Dextroamphetamine, Dose-Response Relationship, Drug, Double-Blind Method, Female, Humans, Inhibition, Psychological, Male, Mental Processes, Psychomotor Performance

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