Evidence map›Paper›PMID 25365808›Full record

ArticleBrain and behavior2014

Genetic basis of delay discounting in frequent gamblers: examination of a priori candidates and exploration of a panel of dopamine-related loci.

Joshua C Gray, James MacKillop

Open access · goldAbstract read
In one paragraph

Article in Brain and behavior, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed, 1 pooled it
5.0field-weighted citation impact, top 5% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

18 citing papers in PubMed, 1 synthesis or guideline pooled it, 31 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. The Genoeconomics of Impulsive Intertemporal Choice: A Critical Review.Journal of the experimental analysis of behavior · 2026
    Review
  4. Article
  5. Article
  6. Similarities and Differences in Genetics.Advances in experimental medicine and biology · 2025
    Review
  7. Review
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. The Behavioral Economics and Neuroeconomics of Alcohol Use Disorders.Alcoholism, clinical and experimental research · 2016
    Review
  15. Article
  16. Article
  17. Article
  18. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

2 authors at 2 institutions in 2 countries.

Joshua C GrayDepartment of Psychology, University of Georgia Athens, Georgia.
James MacKillopBoris Centre for Addictions Research, Department of Psychiatry and Behavioural Neurosciences, McMaster University Hamilton, Ontario, Canada.
McMaster University · CAUniversity of Georgia · US

Funding

Vulnerability to Drug Use & HIV: Advancing Prevention for Rural African AmericansP30DA027827 · NIDA · UNIVERSITY OF GEORGIA · PI BRODY, GENE H. · 2009 to 2018
$10.2M
Enhancing Alcoholism Pharmacotherapy Research via Behavioral EconomicsK23AA016936 · NIAAA · UNIVERSITY OF GEORGIA · PI MACKILLOP, JAMES · 2008 to 2012
$805k
NIAAA NIH HHS K23 AA016936NIDA NIH HHS P30 DA027827
6 · The paper itself

Abstract

introductionDelay discounting is a behavioral economic index of impulsivity that reflects preferences for small immediate rewards relative to larger delayed rewards. It has been consistently linked to pathological gambling and other forms of addictive behavior, and has been proposed to be a behavioral characteristic that may link genetic variation and risk of developing addictive disorders (i.e., an endophenotype). Studies to date have revealed significant associations with polymorphisms associated with dopamine neurotransmission. The current study examined associations between delay discounting and both previously linked variants and a novel panel of dopamine-related variants in a sample of frequent gamblers.

methodsParticipants were 175 weekly gamblers of European ancestry who completed the Monetary Choice Questionnaire to assess delay discounting preferences and provided a DNA via saliva.

resultsIn a priori tests, two loci previously associated with delayed reward discounting (rs1800497 and rs4680) were not replicated, however, the long form of DRD4 VNTR was significantly associated with lower discounting of delayed rewards. Exploratory analysis of the dopamine-related panel revealed 11 additional significant associations in genes associated with dopamine synthesis, breakdown, reuptake, and receptor function (DRD3, SLC6A3, DDC, DBH, and SLC18A2). An aggregate genetic risk score from the nominally significant loci accounted for 17% of the variance in discounting. Mediational analyses largely supported the presence of indirect effects between the associated loci, delay discounting, and pathological gambling severity.

conclusionsThese findings do not replicate previously reported associations but identify several novel candidates and provide preliminary support for a systems biology approach to understand the genetic basis of delay discounting.

Indexed as

Delay DiscountingDopamineGamblingGenetic Association StudiesGenotyping TechniquesHumansImpulsive BehaviorSelf ReportSeverity of Illness IndexSurveys and QuestionnairesWhite PeopleDopamineDelay discountingdopamineendophenotypegeneticsimpulsivitypathological gambling

Identifiers

PMID25365808
PMCPMC4212112
OpenAlexW2083790309

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.