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Developing and Strengthening Cannabis Warnings: Warning Message Testing

8. juli 2026 opdateret af: University of North Carolina, Chapel Hill
The purpose of this activity is to identify promising cannabis warning messages from different themes. Participants will be adults who live in the United States, including both people who use cannabis and those who do not use cannabis. In an online within-subjects experiment, participants will be randomly assigned to view 7 cannabis warning messages from different themes developed as part of previous study activities. After viewing each cannabis warning message, participants will rate the message on awareness, clarity, believability, cognitive elaboration, perceived message effectiveness, and reactance. The survey will take 15-20 minutes.

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

The purpose of this activity is to identify promising cannabis warning messages from different themes.

Setting: An online survey of adults who live in the United States.

Participants: An estimated N=1500 adults who live in the United States, including both people who use cannabis and those who do not use cannabis. Participants will be recruited by Qualtrics Services. Participants who are eligible for the study will view a consent form as part of the survey and check a box to indicate that they agree to participate in the study. Once the participant has completed consent, they will be able to begin the survey.

Procedures: Participants will complete a within-subjects experiment in which they view and rate cannabis warning messages from different themes. Participants will be screened for inclusion and answer questions on demographic information and susceptibility to cannabis use. Participants will then be randomly assigned to view 7 cannabis warning messages from different themes developed as part of previous study activities. After viewing each cannabis warning message, participants will rate the message on awareness, clarity, believability, cognitive elaboration, perceived message effectiveness, and reactance. There will be a total of 11 warning themes plus control. After viewing and rating their assigned cannabis warning messages, participants will answer additional questions about cannabis risk perceptions and use behavior (if applicable), additional demographic information, and about their use of tobacco and alcohol. The survey will take 15-20 minutes.

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

1500

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

  • Navn: Sarah D Kowitt, PhD, MPH
  • Telefonnummer: 919-974-4980
  • E-mail: kowitt@unc.edu

Studiesteder

  • Forenede Stater
    • North Carolina
      • Chapel Hill, North Carolina, Forenede Stater, 27514
        • University of North Carolina at Chapel Hill
        • Kontakt:
          • Sarah D Kowitt, PhD, MPH
          • Telefonnummer: 919-974-4980
          • E-mail: kowitt@unc.edu

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

Ja

Beskrivelse

Inclusion Criteria:

  • Age 18 years of age and older
  • Live in the United States

Exclusion Criteria:

  • Age less than 18 years of age
  • Does not live in the United States

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Forebyggelse
  • Tildeling: N/A
  • Interventionel model: Enkelt gruppeopgave
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Cannabis warning messages

Participants will view and rate 7 cannabis warning messages. The cannabis warning messages cover 11 different themes plus a control theme and were identified in a previous study activity.

Theme 1: Constituents Theme 2: Cognitive Functioning Theme 3: Cardiovascular Health Theme 4: Motor Vehicle Crashes Theme 5: Dependence Theme 6: Psychosis and Schizophrenia Theme 7: Mental Health Theme 8: Reproductive Health Theme 9: Respiratory Health Theme 10: Edibles Theme 11: Cannabis Hyperemesis Syndrome Theme 12: Control
Adfærdsmæssigt: Constituents
Participants will view and rate a message about constituents.
Adfærdsmæssigt: Cognitive Functioning
Participants will view and rate a message about cognitive functioning.
Adfærdsmæssigt: Cardiovascular Health
Participants will view and rate a message about cardiovascular health.
Adfærdsmæssigt: Motor Vehicle Crashes
Participants will view and rate a message about motor vehicle crashes.
Adfærdsmæssigt: Dependence
Participants will view and rate a message about dependence.
Adfærdsmæssigt: Psychosis and Schizophrenia
Participants will view and rate a message about psychosis and schizophrenia.
Adfærdsmæssigt: Mental Health
Participants will view and rate a message about mental health.
Adfærdsmæssigt: Reproductive Health
Participants will view and rate a message about reproductive health.
Adfærdsmæssigt: Respiratory Health
Participants will view and rate a message about respiratory health.
Adfærdsmæssigt: Edibles
Participants will view and rate a message about edibles.
Adfærdsmæssigt: Cannabis Hyperemesis Syndrome
Participants will view and rate a message about cannabis hyperemesis syndrome.
Adfærdsmæssigt: Control
Participants will view and rate a control message.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Cognitive Elaboration
Tidsramme: Baseline (one time online survey)
A one item measure of cognitive elaboration to assess how much a message makes the participant think about the health risks of cannabis. Response options are on a 5-point scale from 5='A great deal' to 1= 'Not at all', with higher scores indicating higher cognitive elaboration.
Baseline (one time online survey)

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Perceived Message Effectiveness
Tidsramme: Baseline (one time online survey)
This survey item assesses perceived message effectiveness in terms of how concerned the message makes the participant feel about the health effects of using cannabis. Response options are on a 5-point scale from 5='A great deal' to 1='Not at all' with higher scores indicating higher perceived message effectiveness.
Baseline (one time online survey)

Andre resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Clarity
Tidsramme: Baseline (one time online survey)
This survey item assesses the extent to which a participant feels that the message is clear. Response options are on a 5-point scale from 5='Very clear' to 1='Not clear at all' with higher scores indicating that a message is more clear.
Baseline (one time online survey)
Believability
Tidsramme: Baseline (one time online survey)
This survey item assesses the extent to which a participant feels that the message is believable. Response options are on a 5-point scale from 5='Very believable' to 1='Not at all believable' with higher scores indicating that a message is more believable.
Baseline (one time online survey)
Reactance
Tidsramme: Baseline (one time online survey)
This survey item assesses reactance in terms of how much a participant is annoyed by the message. Response options are on a 5-point scale from 5='A great deal' to 1='Not at all' with higher scores indicating higher reactance to the message.
Baseline (one time online survey)

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

University of North Carolina, Chapel Hill

Samarbejdspartnere

National Institute on Drug Abuse (NIDA)

Efterforskere

  • Ledende efterforsker: Sarah D Kowitt, PhD, MPH, University of North Carolina, Chapel Hill
  • Ledende efterforsker: Leah M Ranney, PhD, MA, University of North Carolina, Chapel Hill

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Anslået)

13. juli 2026

Primær færdiggørelse (Anslået)

30. november 2026

Studieafslutning (Anslået)

30. november 2026

Datoer for studieregistrering

Først indsendt

25. juni 2026

Først indsendt, der opfyldte QC-kriterier

8. juli 2026

Først opslået (Faktiske)

13. juli 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

13. juli 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

8. juli 2026

Sidst verificeret

1. juni 2026

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • 24-1616
  • R01DA058003 (U.S. NIH-bevilling/kontrakt)

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

JA

IPD-planbeskrivelse

A de-identified version of individual participant data will be shared through the UNC Dataverse

IPD-delingstidsramme

The dataset will be available after data collection and analysis and will remain available for 10 years

IPD-delingsadgangskriterier

Open Access

IPD-deling Understøttende informationstype

  • STUDY_PROTOCOL
  • SAP

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ingen

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

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