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Does alcohol blunt the instinct to step in? study tests bystander behavior

NCT ID NCT05701865

Knowledge-focused Sponsor: University of Colorado, Denver Source: ClinicalTrials.gov ↗

What the study statuses mean

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Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early This study
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Sep 15, 2026 · Last updated Sep 16, 2026 · Updated 1 time

Summary

Researchers at the University of Colorado, Denver, are studying how alcohol intoxication affects a person's willingness to intervene as a bystander in a sexual violence scenario. They will recruit 153 young adults aged 21 to 30 who drink regularly. Participants are randomly assigned to receive either alcohol or a control beverage, and those who receive alcohol complete the task either as their blood alcohol level rises or falls. Participants imagine themselves in a risky situation and report the barriers they perceive and their intentions to intervene. The study compares men and women and those with different attitudes about helping others.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
alcohol
What this could lead to
If alcohol impairs bystander intervention, this could inform prevention programs that teach people to recognize risky situations and step in before drinking clouds their judgment.
What could go wrong
This is a small lab study with simulated scenarios, so what people say they would do may not match real-life behavior. The findings may not apply to all young adults or to other types of violence.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

153 people

The number who actually took part.

Started

Mar 2023

Finished

Aug 2024

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

21 to 30 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Between the ages of 21 and 30 * Report that on at least 3 days in the past year they have consumed an alcohol quantity on a single occasion that was equal or greater to the dose administered in the lab Exclusion Criteria: * Currently seeking treatment or in recovery for an alcohol or substance use disorder * A medical condition or medication use in which alcohol consumption is medically contraindicated * Pregnant, nursing, or has engaged in sexual intercourse without effective contraception in the past two weeks * If the participant is less than six feet tall and weighs over 250 pounds or is over six feet tall and weighs over 300 pounds

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Conditions

The condition(s) this trial relates to.

Alcoholic Intoxication poisoning

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Alcohol intoxication

Contacts and locations

Locations

  • University of Colorado, Denver

    Aurora, Colorado, 80045, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.