Evidence map›Paper›PMID 29178664›Full record

ArticleAddiction biology2019

Environmental enrichment and drug value: a behavioral economic analysis in male rats.

Justin R Yates, Michael T Bardo, Joshua S Beckmann

Open access · greenAbstract read
In one paragraph

Article in Addiction biology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed
1.9field-weighted citation impact, top 15% 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

26 citing papers in PubMed, 35 citations in OpenAlex.

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  19. Environmental enrichment and a selective metabotropic glutamate receptorPharmacology, biochemistry, and behavior · 2020
    Article
  20. 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

3 authors at 1 institution in 1 country.

Justin R YatesDepartment of Psychological Science, Northern Kentucky University, Highland Heights, KY, USA.ORCID 0000-0001-5121-0794
Michael T BardoDepartment of Psychology, University of Kentucky, Lexington, KY, USA.
Joshua S BeckmannDepartment of Psychology, University of Kentucky, Lexington, KY, USA.
University of Kentucky · US

Funding

Training and Pilot CoreP50DA005312 · NIDA · UNIVERSITY OF KENTUCKY · PI BARDO, MICHAEL T · 1987 to 2016
$19.5M
Training in Drug Abuse Related Research.T32DA016176 · NIDA · UNIVERSITY OF KENTUCKY · PI DWOSKIN, LINDA P · 2004 to 2020
$4.0M
NOVELTY, DOPAMINE AND RESPONSE TO AMPHETAMINER01DA012964 · NIDA · YAUPON THERAPEUTICS, INC. · PI BARDO, MICHAEL T · 2000 to 2013
$3.7M
Tonic and Phasic Glutamate Release in Incentive Salience and Cocaine ReinforcemenR00DA033373 · NIDA · UNIVERSITY OF KENTUCKY · PI BECKMANN, JOSHUA · 2014 to 2016
$741k
Tonic and Phasic Glutamate Release in Incentive Salience and Cocaine ReinforcemenK99DA033373 · NIDA · UNIVERSITY OF KENTUCKY · PI BECKMANN, JOSHUA · 2012 to 2013
$263k
NIDA NIH HHS K99 DA033373NIDA NIH HHS P50 DA005312NIDA NIH HHS R00 DA033373NIDA NIH HHS R01 DA012964NIDA NIH HHS T32 DA016176
6 · The paper itself

Abstract

Rats raised in an enriched condition (EC) show decreased stimulant self-administration relative to rats reared in an isolated condition (IC). However, few studies have examined the behavioral mechanisms underlying this environment-induced difference in self-administration. Because economic demand for drugs of abuse predicts addiction-like behavior in both humans and animals, we applied a behavioral economic analysis to cocaine self-administration data in EC and IC rats. During cocaine self-administration, the dose decreased across blocks of trials (0.75-0.003 mg/kg/inf), which allowed for a determination of demand intensity and demand elasticity. Demand intensity did not differ between EC and IC rats; however, cocaine was more elastic in EC rats relative to IC rats (i.e. EC rats were less willing to respond for cocaine as the unit price increased). When EC rats were placed in an isolated condition, demand elasticity decreased, whereas elasticity increased for IC rats placed in an enriched condition. Additionally, we applied behavioral economic analyses to previously published self-administration data and found that our results replicate past findings with cocaine and methylphenidate. To determine if differences in demand elasticity are specific to drug reinforcement, a separate group of rats was tested in sucrose or saccharin self-administration. Results showed that sucrose and saccharin were more elastic in EC rats relative to IC rats, and demand intensity was lower for saccharin in EC rats relative to IC rats. Overall, drug and nondrug reinforcers are more elastic in EC rats, which may account for the protective effects of environmental enrichment against stimulant self-administration.

Indexed as

Social EnvironmentSocial IsolationAnimalsCocaineDopamine Uptake InhibitorsEconomics, BehavioralMaleRatsRats, Sprague-DawleySaccharinSelf AdministrationSucroseSweetening AgentsCocaineDopamine Uptake InhibitorsSaccharinSucroseSweetening Agentsbehavioral economicscocaineenvironmental enrichmentsaccharinself-administrationsucrose

Identifiers

PMID29178664
PMCPMC6265118
OpenAlexW2769364555

What OpenQuestion holds

Textmetadata
LicenceTDM
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.