Evidence map›Paper›PMID 36869212›Full record

Trial reportPsychopharmacology2023

The Blinded-Dose Purchase Task: assessing hypothetical demand based on cocaine, methamphetamine, and alcohol administration.

Meredith S Berry, Gideon P Naudé, Patrick S Johnson, Matthew W Johnson

Open access · hybridFull text readRandomized Controlled Trial
In one paragraph

Trial report in Psychopharmacology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
1.4field-weighted citation impact, top 18% 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

5 citing papers in PubMed, 7 citations in OpenAlex.

  1. Trial
  2. Article
  3. Review
  4. Article
  5. Human laboratory models of reward in substance use disorder.Pharmacology, biochemistry, and behavior · 2024
    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

4 authors at 1 institution in 1 country.

Meredith S BerryBehavioral Pharmacology Research Unit, Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, 5510 Nathan Shock Drive, Baltimore, MD, 21224, USA. mberry@ufl.edu.ORCID http://orcid.org/0000-0002-5526-7437
Gideon P NaudéBehavioral Pharmacology Research Unit, Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, 5510 Nathan Shock Drive, Baltimore, MD, 21224, USA.ORCID http://orcid.org/0000-0001-9772-9313
Patrick S JohnsonBehavioral Pharmacology Research Unit, Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, 5510 Nathan Shock Drive, Baltimore, MD, 21224, USA.ORCID http://orcid.org/0000-0002-3970-2531
Matthew W JohnsonBehavioral Pharmacology Research Unit, Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, 5510 Nathan Shock Drive, Baltimore, MD, 21224, USA. mwj@jhu.edu.ORCID http://orcid.org/0000-0001-7068-0513
Johns Hopkins University · US

Funding

HUMAN BEHAVIORAL PHARMACOLOGY OF SUBSTANCE ABUSET32DA007209 · NIDA · JOHNS HOPKINS UNIVERSITY · PI Eric C. Strain, Elise M Weerts · 1985 to 2026
$12.9M
Development of a Prospective Memory Intervention to Reduce Drug Use and HIV RiskR01DA035277 · NIDA · JOHNS HOPKINS UNIVERSITY · PI JOHNSON, MATTHEW WAYNE · 2013 to 2018
$2.0M
Role of delay discounting in driving HIV sexual risk behavior in cocaine abuseR01DA032363 · NIDA · JOHNS HOPKINS UNIVERSITY · PI JOHNSON, MATTHEW WAYNE · 2012 to 2014
$959k
Opioid-Sparing and Pain-Reducing Properties of Syntocinon: A Dose-Effect DeterminationK01DA052673 · NIDA · UNIVERSITY OF FLORIDA · PI Meredith Berry · 2022 to 2026
$916k
The potential of oxytocin to reduce opioid abuse liability and pain among older adultsR21DA056813 · NIDA · UNIVERSITY OF FLORIDA · PI BERRY, MEREDITH, CRUZ-ALMEIDA, YENISEL · 2023 to 2024
$419k
HIV Sexual Risk Behavior: Methamphetamine and Delay Discounting of Sexual RewardsR21DA032717 · NIDA · JOHNS HOPKINS UNIVERSITY · PI JOHNSON, MATTHEW WAYNE · 2012 to 2013
$409k
NIDA NIH HHS K01 DA052673NIDA NIH HHS K01DA052673NIDA NIH HHS L30 DA052084NIDA NIH HHS R01DA032363NIDA NIH HHS R01DA035277NIDA NIH HHS R21DA032717NIDA NIH HHS T32DA007209
6 · The paper itself

Abstract

rationaleBehavioral economic drug purchase tasks quantify the reinforcing value of a drug (i.e., demand). Although widely used to assess demand, drug expectancies are rarely accounted for and may introduce variability across participants given diverse drug experiences.

objectivesThree experiments validated and extended previous hypothetical purchase tasks by using blinded drug dose as a reinforcing stimulus, and determined hypothetical demand for experienced effects while controlling for drug expectancies.

methodsAcross three double-blind, placebo-controlled, within-subject experiments, cocaine (0, 125, 250 mg/70 kg; n=12), methamphetamine (0, 20, 40 mg; n=19), and alcohol (0, 1 g/kg alcohol; n=25) were administered and demand was assessed using the Blinded-Dose Purchase Task. Participants answered questions regarding simulated purchasing of the blinded drug dose across increasing prices. Demand metrics, subjective effects, and self-reported real-world monetary spending on drugs were evaluated.

resultsData were well modeled by the demand curve function, with significantly higher intensity (purchasing at low prices) for active drug doses compared to placebo for all experiments. Unit-price analyses revealed more persistent consumption across prices (lower α) in the higher compared to lower active dose condition for methamphetamine (a similar non-significant finding emerged for cocaine). Significant associations between demand metrics, peak subjective effects, and real-world spending on drugs also emerged across all experiments.

conclusionsOrderly demand curve data revealed differences across drug and placebo conditions, and relations to real-world measures of drug spending, and subjective effects. Unit-price analyses enabled parsimonious comparisons across doses. Results lend credence to the validity of the Blinded-Dose Purchase Task, which allows for control of drug expectancies.

Indexed as

CocaineMethamphetamineEconomics, BehavioralEthanolHumansSelf ReportCocaineEthanolMethamphetamineAbuse liabilityAlcoholBehavioral economicsBlinded-Dose Purchase TaskCocaineDemand curveDrug useHumanMethamphetaminePurchase taskUnit price

Identifiers

PMID36869212
PMCPMC10006272
OpenAlexW4323032888

What OpenQuestion holds

Textfull text, public
LicenceCC BY
measurements read157
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.