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Survey reveals hidden psychological factors behind vaccine choices

NCT ID NCT07172074

Knowledge-focused Sponsor: University of Iowa Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

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 This study
The trial has finished. Results may not be published yet.
Stopped early
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This status has not been confirmed recently, so it may be out of date.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 Jun 26, 2026 · Last updated Jun 26, 2026

Summary

This completed study surveyed 1,786 US adults to understand which psychological traits—like needle fear, distrust, or open-mindedness—are most strongly linked to vaccine attitudes and history. Participants answered questions online about their feelings toward vaccines and which age-recommended vaccines they had received. The goal is to find new ways to encourage vaccination by targeting the right psychological motives.

What this could mean

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

What this could lead to
If successful, this could identify key psychological targets for future vaccine promotion campaigns, potentially increasing vaccination rates.
What could go wrong
This is an observational survey study, not a clinical trial testing an intervention. The findings are associations, not proof of cause and effect, and may not translate into real-world behavior change.

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

1,786 people

The number who actually took part.

Started

Dec 2022

Finished

Feb 2025

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

18 years and older

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: * Consent to participate * Agree to provide quality responses Exclusion Criteria: * Quota completed (Equal #s of respondents in each group) * Age group: 18-49, 50-64, 65+ * Race/ethnicity: Non-Hispanic White, Non-Hispanic Black, Hispanic * Income: \<$50K, $50K or more * Gender: Female, Male or other gender identity

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Conditions

The condition(s) this trial relates to.

Vaccination Hesitancy

As listed by the trial registrant

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

Psychological aspects Vaccination Vaccination hesitancy Vaccination promotion

Contacts and locations

Locations

  • University of Iowa

    Iowa City, Iowa, 52242, United States

More trials for these conditions

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