Evidence map›Paper›PMID 31250074›Full record

ArticlePsychopharmacology2019

False memory formation in cannabis users: a field study.

Lilian Kloft, Henry Otgaar, Arjan Blokland, Alicja Garbaciak, Lauren A Monds, Johannes G Ramaekers

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Psychopharmacology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed, 2 pooled it
–field-weighted citation impact
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

7 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Cannabis increases susceptibility to false memory.Proceedings of the National Academy of Sciences of the United States of America · 2020
    Trial
  4. Article
  5. Review
  6. Article
  7. 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

6 authors.

Lilian KloftFaculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands. l.kloft@maastrichtuniversity.nl.ORCID http://orcid.org/0000-0002-4615-9581
Henry OtgaarFaculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands.
Arjan BloklandFaculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands.
Alicja GarbaciakFaculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands.
Lauren A MondsFaculty of Medicine and Health, The University of Sydney, Sydney, Australia.
Johannes G RamaekersFaculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands.

Funding

Nederlandse Organisatie voor Wetenschappelijk Onderzoek 406.16.529
6 · The paper itself

Abstract

rationaleCannabis use is widespread and has previously been associated with memory impairments. However, the role of cannabis in relation to false memory production, i.e., memories of events that were not experienced, is less well-understood.

objectiveThe aim of the current field study was to examine the impact of cannabis use on false memory production.

methodsThe Deese/Roediger-McDermott (DRM) paradigm was used to induce false memories. In this paradigm, participants study word lists that are associatively related to a non-presented word, termed the critical lure. In a later memory test, true recognition rates and false alarm rates toward critical lures and unrelated items are assessed. Memory performance was compared between three groups: regular cannabis consumers who were acutely intoxicated (n = 53), regular cannabis consumers who were sober (n = 50), and cannabis-naïve controls (n = 53). The participants were approached in Dutch coffee shops (cannabis outlets) and cafes and asked to participate in our study. After collecting general information on their cannabis use, they were subjected to the DRM procedure.

resultsAlthough false memory rates for critical lures did not statistically differ between groups, both intoxicated and sober cannabis consumers falsely recognized more unrelated items than control participants. Also, individuals without a history of cannabis use demonstrated higher memory accuracy compared with the intoxicated group.

conclusionIt is concluded that cannabis intoxication and history of cannabis use induce a liberal response criterion for newly presented words for which the level of association with previously learned words is low and uncertainty is high.

Indexed as

Repression, PsychologyAdolescentAdultCognitionFemaleHumansMaleMarijuana SmokingMemoryMemory DisordersMental RecallVerbal LearningYoung AdultCannabisDRM paradigmFalse memoryRecognition memoryTHC

Identifiers

PMID31250074
PMCPMC6892757

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.