NCT07713264 · Stanford University
Voices Illuminating Solutions for Outdoor Workers' Needs and Safety
(VISIONS)
What this study is about
The goal for this multidisciplinary randomly assigned controlled trial (RCT) is to actively and meaningfully engage outdoor workers (can include agricultural workers, construction workers, landscaping, wildland firefighters, fire cleanup crews, etc.
View original scientific description
The goal for this multidisciplinary randomized controlled trial (RCT) is to actively and meaningfully engage outdoor workers (can include agricultural workers, construction workers, landscaping, wildland firefighters, fire cleanup crews, etc.) and community members in describing the impact of climate change on their lives and working conditions in San Joaquin Valley, Kings County, and Monterey County. Participants will be randomly assigned to one of two study arms: (1) the Intervention Group, which will receive bilingual (Spanish and English) Cal/OSHA educational materials and engage in the Our Voice participatory action research (photovoice) method using a bilingual (Spanish and English) mobile application, or (2) the Control Group, which will only receive bilingual (Spanish and English) Cal/OSHA educational materials. Core outcomes will be measured identically across both groups to allow direct comparison of the two approaches. Using the "Our Voice participatory action research method" and Cal/OSHA educational materials, the investigators will learn about participants' attitudes, behaviors, and actions in response to changing climate in the counties and evaluate whether the education and photovoice approach is more impactful than traditional didactic Cal/Osha education only.
Interventions
BEHAVIORAL
Receive education on heat and air quality health risks
Participants will receive Cal/OSHA educational materials covering heat and air quality risks for outdoor workers \[will insert more info (how often, method etc once MP revises protocol\].
BEHAVIORAL
Participate in Photovoice and climate health risk education
Participants will engage in the full Our Voice photovoice program, including training on the Discovery Tool, a Discovery Walk, attendance at a Community Discovery Meeting, and receive the same Cal/OSHA educational materials \[will insert more info (how often, method etc once MP revises protocol\].
Primary outcome measures
Change in self-efficacy as assessed by the Individual Community-Related Empowerment (ICRE) Scale.
Time frame: Change in self-efficacy from baseline to immediately after the intervention photovoice activity or control education activity and at 6 months
Each participant will complete the Individual Community-Related Empowerment (ICRE) at baseline, immediately after the intervention photovoice activity or control education activity, and 6 months. The ICRE Scale is an 18-item measure of empowerment capturing the following five dimensions: self-efficacy (personal confidence in capacity to change one's community), intention (desire to engage with or for the community), participation (actual community involvement), motivation (beliefs surrounding community engagement), and critical awareness (perceived seriousness of community issues). Response options are on a five point rating scale ranging from 1 = "strongly agree" (the most favorable perception) to 5= "strongly disagree" (the most unfavorable perception). Lower raw scores indicate greater empowerment.
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Participants must be 18 years or older.
- Participants must be connected to the San Joaquin Valley, Monterey County, or Kings County as either an outdoor worker or community member.
- Participants must have the capacity to verbally consent in English or Spanish
- Participants must have the ability to walk or otherwise move around their community using the Discovery Tool.
- Have a smartphone capable of loading the Discovery Tool OR willingness to use a TracFone provided by the research team
Exclusion criteria
- Inability to consent to the study.
- Unable to navigate the Discovery Tool with reasonable technical guidance from the research team.
Where
- Stanford, California
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Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Oct 8, 2026 · Source of record for eligibility and locations