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Substance Use and Media Preferences

2 november 2026 bijgewerkt door: Ruschelle Leone, University of Colorado, Denver

The goal of this randomized clinical trial is to learn how alcohol use, cannabis use, and using both substances affect whether and how quickly people stop a video being shown to a woman. The study will recruit 312 people from the Metro-Denver area who drink alcohol and use cannabis; half of the participants will be women. The main questions it aims to answer are:

  • How do alcohol, cannabis, and their combined use affect whether participants stop the video and how quickly they do so?
  • Does alcohol use versus alcohol and cannabis use by others in the scenario affect whether and how quickly participants stop the video?

Researchers will compare four randomly assigned groups: alcohol only, cannabis only, both alcohol and cannabis, and neither substance. Participants will also be randomly assigned to one of two scenarios involving alcohol use or alcohol and cannabis use by others. These comparisons will help researchers understand how participants' own substance use and substance use by others affect their decisions to intervene.

Participants will:

  • Complete a phone call to review the study and schedule a mobile laboratory visit at their home.
  • Have their ID checked, complete a breath alcohol test to confirm no alcohol is in their system, and be weighed. Female participants will also take a pregnancy test.
  • Provide written consent and complete questionnaires so researchers can confirm eligibility before random assignment.
  • Follow their assigned substance-use condition. Participants in the cannabis-only group will smoke their usual cannabis at home while staff monitor them through Zoom. Those in the alcohol-only group will drink two weight-based alcoholic beverages, with a target blood alcohol concentration of 0.08%. Those assigned to both substances will use cannabis first and then drink alcohol. Those assigned to neither substance will not use either as part of the study.
  • Provide blood and breath samples to measure cannabis-related THC and alcohol levels.
  • Complete a task in which they can choose to stop a video being shown to a woman. Researchers will measure whether they stop the video and how long they take to do so.
  • Take part in a recorded interview about their experience and the reasons they did or did not stop the video. Researchers will analyze these interviews to better understand how substance use affects decisions.
  • Answer questions about what they believed the study was testing and their impressions of the other participants, receive an explanation of the study, and receive compensation.

Studie Overzicht

Toestand

Nog niet aan het werven

Conditie

Interventie / Behandeling

Studietype

Ingrijpend

Inschrijving (Geschat)

312

Fase

  • Niet toepasbaar

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studie Locaties

    • Colorado
      • Denver, Colorado, Verenigde Staten, 80045
        • University of Colorado Anschutz Medical Campus
        • Contact:
        • Hoofdonderzoeker:
          • Ruschelle Leone, PhD

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

21 jaar tot 30 jaar (Volwassen)

Accepteert gezonde vrijwilligers

Ja

Geslachten die in aanmerking komen voor studie

Allemaal

Beschrijving

Inclusion Criteria:

  1. Provision of signed and dated informed consent form.
  2. Stated willingness to comply with all study procedures and lifestyle considerations .
  3. Aged 21-30, verified by a photo ID.
  4. Consume an alcohol quantity on a single occasion that is equal to or greater than the dose administered in the laboratory on ≥ 3 days in the past year (see Table 1).
  5. Smoked cannabis ≥ 3 days in the past year.
  6. Engaging in simultaneous alcohol and cannabis use ≥ 1 day in the past year.

Exclusion Criteria:

  1. Currently being treated or in recovery for alcohol or drug problems; currently interested in seeking treatment for drinking or drug use via self-report.
  2. Experienced an adverse event while co-using alcohol and cannabis at any time in the past 3 months.
  3. Any medical or psychiatric condition, as well as current use of a medication, that would contraindicate alcohol administration as determined by the Study Physician.
  4. Acute Psychiatric Symptomatology: elevated psychological distress as indicated by a score greater than 65 on the Brief Symptom Inventory.
  5. Self-report that a participant is trying to get pregnant, currently pregnant, or a positive pregnancy test.
  6. Combined height and weight that is either less than 6 feet tall and over 230 lbs, or over 250 lbs and over 6 ft tall as measured during the lab visit or by a valid photo ID.
  7. Current or past participation in PI Leone's research study 'Understanding the Influence of Alcohol and Media on Relationships' protocol #24-1867.

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Primair doel: Fundamentele wetenschap
  • Toewijzing: Gerandomiseerd
  • Interventioneel model: Faculteitstoewijzing
  • Masker: Geen (open label)

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Experimenteel: Alcohol Consumption + Alcohol Consumption of Others

Participants will be assigned to drink alcohol and the others in the study will also be assigned to drink alcohol.

Participants will consume a moderate alcohol dose condition (target BrAC .08%) with the National Institute on Alcohol Abuse and Alcoholism (NIAAA) approved alcohol administration procedures.

Others in the study will be assigned to drink alcohol

Experimenteel: Alcohol Consumption + Alcohol/Cannabis Consumption of Others

Participants will be assigned to drink alcohol and the others in the study will be assigned to drink alcohol and consume cannabis.

Participants will consume a moderate alcohol dose condition (target BrAC .08%) with the National Institute on Alcohol Abuse and Alcoholism (NIAAA) approved alcohol administration procedures.

Others in the study will be assigned to drink alcohol and consume cannabis

Experimenteel: Alcohol/Cannabis Consumption + Alcohol Consumption of Others

Participants will be assigned to drink alcohol and consume cannabis; and the others in the study will be assigned to drink alcohol.

Others in the study will be assigned to drink alcohol

Participants in this group will self-administer legal-market flower cannabis Participants will consume a moderate alcohol dose condition (target BrAC .08%) with the National Institute on Alcohol Abuse and Alcoholism (NIAAA) approved alcohol administration procedures.

Experimenteel: Alcohol/Cannabis Consumption + Alcohol/Cannabis Consumption of Others

Participants will be assigned to drink alcohol and consume cannabis; and the others in the study will be assigned to drink alcohol and consume cannabis.

Others in the study will be assigned to drink alcohol and consume cannabis

Participants in this group will self-administer legal-market flower cannabis Participants will consume a moderate alcohol dose condition (target BrAC .08%) with the National Institute on Alcohol Abuse and Alcoholism (NIAAA) approved alcohol administration procedures.

Actieve vergelijker: Sober + Alcohol Consumption of Others

Participants will be assigned to drink a non-alcohol control beverage; and the others in the study will be assigned to drink alcohol.

Others in the study will be assigned to drink alcohol

Participants will be assigned to a no-alcohol control beverage and to not consume cannabis.

Actieve vergelijker: Sober + Alcohol/Cannabis Consumption of Others

Participants will be assigned to drink a non-alcohol control beverage; and the others in the study will be assigned to drink alcohol and consume cannabis.

Others in the study will be assigned to drink alcohol and consume cannabis

Participants will be assigned to a no-alcohol control beverage and to not consume cannabis.

Experimenteel: Cannabis Consumption + Alcohol Consumption of Others

Participants will be assigned to consume cannabis, and the others in the study will be assigned to drink alcohol.

Others in the study will be assigned to drink alcohol

Participants in this group will self-administer legal-market flower cannabis

Experimenteel: Cannabis Consumption + Alcohol/Cannabis Consumption of Others

Participants will be assigned to consume cannabis, and the others in the study will be assigned to drink alcohol and consume cannabis.

Others in the study will be assigned to drink alcohol and consume cannabis

Participants in this group will self-administer legal-market flower cannabis

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Intervention Likelihood
Tijdsspanne: Up to three hours after consent

Stopping a woman from watching content during the Bystander Intervention Paradigm (Parrott et al., 2012, Leone et al., 2015). Possible scores are 0 (not stopping) to 1 (stopping).

Up to three hours after consent
Intervention Speed
Tijdsspanne: Up to three hours after consent

The amount of time the woman watches the sexually explicit film during the Bystander Intervention Paradigm (Parrott et al., 2012, Leone et al., 2015). Scores range from 0 to 4 minutes.

Up to three hours after consent
Number of Bystander Barriers
Tijdsspanne: Up to four hours after consent

Count number of barriers experienced during the paradigm via a semi-structured interview.

Up to four hours after consent
Number of Bystander Facilitators
Tijdsspanne: Up to four hours after consent

Count number of facilitators experienced during the paradigm via a semi-structured interview.

Up to four hours after consent

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

Medewerkers

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Geschat)

1 mei 2027

Primaire voltooiing (Geschat)

1 maart 2031

Studie voltooiing (Geschat)

1 maart 2031

Studieregistratiedata

Eerst ingediend

2 november 2026

Eerst ingediend dat voldeed aan de QC-criteria

2 november 2026

Eerst geplaatst (Werkelijk)

6 november 2026

Updates van studierecords

Laatste update geplaatst (Werkelijk)

6 november 2026

Laatste update ingediend die voldeed aan QC-criteria

2 november 2026

Laatst geverifieerd

1 november 2026

Meer informatie

Termen gerelateerd aan deze studie

Andere studie-ID-nummers

  • 26-1956
  • R01AA032801 (Subsidie/contract van de Amerikaanse NIH)

Plan Individuele Deelnemersgegevens (IPD)

Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?

JA

Beschrijving IPD-plan

IPD will be available in the NIAAA Data Archive.

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Nee

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Nee

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