Research with Minors: Special IRB Considerations

Research with minors adds a layer of protection on top of the usual Common Rule requirements. Subpart D of the federal regulations, at 45 CFR 46.401 through 45 CFR 46.409, sets out those additional protections. They are not as burdensome as they look, but they require drafting changes that first-time applicants routinely miss.

The four risk categories

Subpart D sorts research with children into four categories, each with different approval requirements:

1. Research not involving greater than minimal risk. Approvable with assent from the child and permission from one parent.
2. Research involving greater than minimal risk but presenting the prospect of direct benefit to the individual child. Approvable with assent and permission from one parent, if risk is justified by benefit.
3. Research involving greater than minimal risk and no prospect of direct benefit, but likely to yield generalizable knowledge about the child's disorder or condition. Requires permission from both parents (with narrow exceptions) and rigorous IRB review.
4. Research not otherwise approvable that presents an opportunity to understand, prevent, or alleviate a serious problem affecting children's health or welfare. Requires federal-level review and is rare.

Most student research on minors sits in category 1. Know which category applies to yours and cite it in the protocol.

Assent vs. parental permission

Two documents, two different audiences.

Parental permission is the equivalent of informed consent, written for a parent. It meets all the normal Common Rule requirements and describes what the parent is permitting their child to do.

Assent is the child's agreement to participate, written at an age-appropriate reading level. For very young children (under 7 or so), assent is typically obtained verbally and documented by the researcher. For older children and adolescents, a written assent form is standard.

Assent is not legally equivalent to consent — parents still have to give permission — but the child's dissent controls. If the child refuses, the child does not participate, regardless of parental permission.

Drafting an assent form

Pitch the reading level to the age group. For elementary-age children, one page, short sentences, concrete words ("we will ask you questions about school"). For middle schoolers, a longer form with the same structural elements as an adult consent, written conversationally. For high schoolers, something very close to adult consent in substance, still at a lower reading level than a legal contract.

Describe:

• Who you are and why you are asking.
• What the child will do, step by step.
• How long it will take.
• That they can stop at any time with no penalty.
• Who they can talk to if they have questions or feel uncomfortable.

Our consent form guide includes sample assent language for three age bands, and the consent form template library has assent and parental permission templates you can adapt.

School-based research

Most research with minors happens in schools, and schools have their own gatekeeping. You need, in order:

• District or school permission in writing (letter of cooperation on school letterhead).
• Parental permission forms distributed through the school.
• Child assent at the time of data collection.

Some districts have their own research review process that runs parallel to your IRB. Factor that into your timeline.

For practicum, program evaluation, or community-based work in school and youth-serving settings, The Public Health Practicum Logbook covers how practicum and IRB requirements interact — useful if your project sits at the boundary between evaluation and research.

Waivers of parental permission

In narrow cases, the IRB can waive parental permission under 45 CFR 46.408(c) — typically for research on abuse or neglect where obtaining parental permission would not be a reasonable protection. These waivers are rare for student research, and reviewers apply them strictly. If you think you need one, talk to your IRB coordinator before drafting.

Emancipated minors and adolescents seeking care

Some states recognize emancipated minors or give adolescents the right to consent for specific services (reproductive, mental health, substance use). State law determines whether a minor can consent on their own behalf, and the IRB will ask you to document the applicable state statute if you are relying on independent consent.

Data and longitudinal studies

For longitudinal research that spans a minor's 18th birthday, you will need to re-consent them as an adult once they turn 18. Describe this re-consent process in the protocol at submission — do not wait until the first birthday to address it.

What reviewers flag most

The common comments on studies with minors are:

• Assent form written at too high a reading level.
• Parental permission form too short on specifics about what the child will experience.
• No description of how dissent will be handled.
• No letter of cooperation from the school.
• Unclear plan for re-consent at 18 in longitudinal studies.

Each of these is a straightforward drafting fix. For the broader structure of the protocol itself, see our protocol writing guide.

The mindset

Working with minors is not harder — it is more explicit. The protections are clear, the required documents are stable, and reviewers are consistent. Spend the extra drafting time on age-appropriate language and on the school-side paperwork, and the rest of the review looks like a minimal-risk study with extra attachments.