CoChat
Sign Up
Cited by 130Coffee research and impactsSleep and Work-Related FatigueMind wandering and attention

The DOI matches its Crossref record; 47 of the 47 references it cites were found in a registry or an index.

Effects of caffeine on performance and mood depend on the level of caffeine abstinence

Open access
Yeomans, Martin, Ripley, Tamzin, Davies, Laura, Rusted, Jennifer, Rogers, Peter·2002·Psychopharmacology
DOI 10.1007/s00213-002-1204-1
Open this paper in CoChat — free account

Abstract

Rationale Most studies of the effects of caffeine on performance have used regular caffeine consumers who are deprived at test. Thus the reported effects of caffeine could be explained through reversal of caffeine withdrawal.Objectives To test how preloading deprived caffeine consumers with 0, 1 or 2 mg/kg caffeine altered the subsequent ability of caffeine to modify mood and performance.Methods Thirty moderate caffeine consumers were given a drink containing 0, 1 or 2 mg/kg caffeine at breakfast followed 60 min later by a second drink containing either 0 or 1 mg/kg caffeine. Performance on a measure of sustained attention and mood were measured before and after each drink.Results Administration of both 1 and 2 mg/kg caffeine at breakfast decreased reaction time and 1 mg/kg caffeine also increased performance accuracy on the sustained attention (RVIP) task relative to placebo. Both breakfast doses of caffeine also improved rated mental alertness. Similarly, 1 mg/kg caffeine administered 60 min after breakfast decreased reaction time and increased rated mental alertness in the group who had not been given caffeine at breakfast. However, this second dose of caffeine had no effect on subsequent performance or mood in the two groups who had received caffeine at breakfast.Conclusions Caffeine reliably improved performance on a sustained attention task, and increased rated mental alertness, in moderate caffeine consumers who were tested when caffeine-deprived. However, caffeine had no such effects when consumers were no longer caffeine deprived. These data are consistent with the view that reversal of caffeine withdrawal is a major component of the effects of caffeine on mood and performance.

Overview

Integrity signals

Registry

Crossref · 10.1007/s00213-002-1204-1

Cites

47 of 47 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Verification

Claims the paper makes

We couldn’t retrieve this paper’s full text, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Citations

Cites

Cited by

Sorted by citations

See all 130

Related

See all

Metadata

Authors
Yeomans, M., Ripley, T., Davies, L., Rusted, J., & Rogers, P.
Affiliations
  • University of Sussex (GB)
  • University of Bristol (GB)
Corresponding author
Yeomans, Martin
ORCID
Venue
Psychopharmacology
Publisher
Springer Science and Business Media LLC
Published
2002-11-01
Volume
164
Issue
3
Pages
241-249
ISSN
  • 0033-3158 (ISSN-L)
  • 1432-2072
DOI
10.1007/s00213-002-1204-1
OpenAlex
W2151484680
Cited by
130
References
47
Citations by year
2025: 3 · 2024: 4 · 2023: 1 · 2022: 4 · 2021: 1 · 2020: 3 · 2019: 4 · 2018: 6 · 2017: 3 · 2016: 6 · 2015: 3 · 2014: 7 · 2013: 6 · 2012: 11
FWCI
5.04
Type
journal article
Language
en
Open access
Licence
Locations
  • Psychopharmacology (publishedVersion)
  • PubMed (publishedVersion)
  • Explore Bristol Research (publishedVersion)
  • Figshare (submittedVersion, cc-by)
Topics
  • Health Sciences › Medicine › Pharmacology (medical) › Coffee research and impacts
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and Work-Related Fatigue
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Mind wandering and attention
Keywords
caffeine, caffeine withdrawal, caffeine abstinence, sustained attention, reaction time, mental alertness, mood
MeSH terms
Adult, Affect, Central Nervous System Stimulants, Attention, Caffeine, Coffee, Dose-Response Relationship, Drug, Double-Blind Method, Drug Administration Schedule, Female, Humans, Male, Placebos, Psychomotor Performance, Surveys and Questionnaires, Reaction Time, Time Factors

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review