01 · The Question
Can a child participate if they say yes but the parent says no?
A teenager understands your study, asks thoughtful questions, and clearly wants to participate. Their parent, however, refuses permission. The adolescent may be disappointed, and the researcher may believe participation would be valuable. Can the child's assent be enough?
If parental or guardian permission is required for that study and has not been waived, generally no. The child's willingness matters, but assent does not replace required parental permission.
The situation becomes more complicated when the child can legally consent for themselves, when parental permission has been appropriately waived, or when the research involves circumstances for which ordinary parental-permission requirements may not apply. Those possibilities need to be established before enrollment, not improvised because a particular child wants to participate.
02 · The Short Answer
Required parental permission must still be obtained
In Brief
If a child assents to research but parental or guardian permission is required and has not been waived, the child cannot be enrolled without that permission.
Under the U.S. HHS framework, OHRP explicitly states that parental or guardian permission is required before enrollment when the requirement has not been waived, even if the child has already assented. Different rules may apply if the participant can legally consent to the research or the IRB has approved a waiver of parental permission.
03 · What You Need to Know
A child's willingness and a parent's authorization do different things
Assent does not substitute for required parental permission
Research regulations distinguish the child's assent from the parent or guardian's permission. Assent represents the child's affirmative agreement to participate. Parental permission represents the parent's or guardian's agreement to the child's participation when that authorization is required.
For research covered by HHS Subpart D, OHRP states directly that when a child assents but parental permission has not been waived, the required parental or guardian permission must also be obtained before the child can be enrolled.
This is why researchers should determine in advance when both assent and parental permission are required . The two decisions are connected, but they are not interchangeable.
The child says yes
The child has provided assent when the agreement is meaningful, affirmative, and obtained through an appropriate assent process.
The parent says no
Required parental permission has not been obtained, so the child ordinarily cannot be enrolled unless a valid waiver or another applicable legal basis permits participation without it.
The researcher cannot simply override the parent's refusal
A researcher's belief that participation would be interesting, scientifically valuable, or desirable to the child does not create authority to disregard a required parental-permission process.
Nor should investigators treat the child's enthusiasm as a reason to pressure the parent. Permission must be sought under conditions that minimize coercion and undue influence. A parent's decision should not become a negotiation in which the research team repeatedly attempts to convert a refusal into agreement merely because recruitment would benefit.
First ask whether the participant is legally a child for this research
Chronological age alone does not settle every case. Under HHS regulations, a child is a person who has not reached the legal age for consent to the treatments or procedures involved in the research under the applicable law of the jurisdiction where the research will occur.
This means that a person who is legally able to consent to a particular treatment or procedure may, depending on the research activities and applicable law, not be treated as a child for that intervention or interaction. Researchers should verify the law rather than assuming that everyone below age 18 necessarily requires parental permission for every type of research.
Parental permission can sometimes be waived
HHS regulations provide circumstances in which an IRB may waive parental or guardian permission. One pathway applies when the relevant regulatory requirements for waiver or alteration are satisfied. Another applies when the IRB determines that parental or guardian permission is not a reasonable requirement for protecting the children involved, such as certain research involving neglected or abused children, provided an appropriate protective mechanism is substituted and the waiver is consistent with applicable law.
A researcher cannot create this waiver after a particular parent refuses. It is an IRB determination that must satisfy the applicable regulatory requirements. The circumstances in which researchers may conduct research without parental permission therefore require separate ethical and regulatory analysis.
Sensitive adolescent research can make the issue particularly difficult
Some research concerns health, behavior, abuse, or other sensitive matters for which involving a parent may be complicated or potentially harmful. In those situations, the question is not simply whether an adolescent would prefer to participate privately.
Researchers need to determine whether applicable law permits the adolescent to consent independently or whether an IRB can appropriately waive parental permission. The protocol also needs adequate protections for the young participants. The specific problem of parental permission in sensitive adolescent research should therefore be addressed prospectively rather than solved case by case during recruitment.
Assent can sometimes be sought before parental permission
HHS regulations do not prescribe a universal order in which assent and parental permission must be obtained. OHRP notes that parental permission will generally be sought first, particularly for research involving more than minimal risk, but some minimal-risk studies may reasonably seek the child's assent first.
OHRP gives the example of a minimal-risk school study in which interested children could first indicate that they want to participate and then take a parental-permission request home. If parental permission is required, however, the child still cannot be enrolled until it is obtained.
Watch Out
Do not treat a parent's refusal as an invitation to search retrospectively for a waiver so that a particular willing child can be enrolled. Any waiver of parental permission must satisfy the applicable regulatory and legal requirements and be approved through the appropriate review process.
A parent's initial refusal may not necessarily be permanent
A parent may sometimes decline because they misunderstood the study or need additional information. Researchers may answer legitimate questions and clarify inaccurate assumptions without pressuring the parent to change their decision.
If the parent later independently reconsiders, the research team should follow the IRB-approved permission procedure. The important distinction is between providing information and repeatedly pursuing a reluctant parent until a desired answer is obtained.
04 · A Practical Example
A willing adolescent still cannot bypass required permission
Hypothetical Example
A 15-year-old wants to join a school-based study
Suppose a minimal-risk study recruits adolescents for interviews about study habits. The IRB requires adolescent assent and parental permission and has not waived either requirement.
The adolescent assents
The student reads the age-appropriate study information, asks questions, and clearly says they want to participate.
The parent declines
The parent receives the permission information and says they do not want their child participating.
The researcher does not enroll the adolescent
Because parental permission remains an approved requirement, the adolescent's assent alone is insufficient for enrollment.
The research team respects the decision
The adolescent should not be encouraged to conceal participation from the parent or enrolled through an unofficial workaround.
Now change the protocol rather than the individual case. Suppose the proposed research involved a population for which requiring parental permission was not a reasonable protection and the IRB had prospectively approved a legally permissible waiver with appropriate alternative safeguards. The enrollment requirements could then differ. The key difference is the approved regulatory framework, not how strongly one particular adolescent wants to participate.
06 · What This Means for You
Resolve the permission pathway before recruitment begins
If your study includes minors, the protocol should make clear what happens when a child assents but a parent refuses. Study staff should not have to invent a response while standing beside a disappointed participant.
A simple decision framework
If parental permission is required and the parent refuses
Do not enroll the child on the basis of assent alone.
If you believe the participant may legally consent independently
Verify the applicable law and the IRB-approved consent pathway before treating the participant as legally able to consent.
If parental permission may be inappropriate for the study population
Seek prospective IRB review of any legally available waiver and proposed alternative protections rather than bypassing permission during recruitment.
If the parent appears to have misunderstood the study
Clarify the information neutrally and answer questions without pressuring the parent to reverse the decision.
Researchers should also consider how the refusal will be communicated to the child. Avoid implying that the child failed, answered incorrectly, or caused a problem. Their willingness was genuine even though another required authorization was not obtained.
Finally, do not assume the reverse disagreement follows exactly the same logic. When a parent gives permission but the child says no , the child's assent requirement becomes central, and different regulatory exceptions may matter.
07 · A Quick Checklist
When a child wants to participate but the parent refuses, check the authorization
Before deciding what happens next, check:
Verify whether the participant is legally considered a child for the research treatments or procedures involved.
Confirm whether parental or guardian permission is required under the approved protocol.
Confirm whether the IRB has approved any waiver of parental permission and exactly what that waiver covers.
Do not treat the child's assent as a substitute for required parental permission.
Answer parental questions accurately without pressuring a parent who has declined participation.
Do not create an unofficial workaround that allows the child to participate without required authorization.
For sensitive studies, address any need for a parental-permission waiver prospectively through the appropriate ethics and legal review.
09 · The Bottom Line
A child's yes cannot replace a required parental yes
The Bottom Line
When a child wants to participate but a parent refuses, the child cannot ordinarily be enrolled if parental permission is required and has not been waived.
The child's willingness still matters, but assent and parental permission perform different functions. Verify whether parental permission is legally and ethically required, whether an approved waiver applies, and whether the participant can independently consent before deciding how enrollment should proceed.
11 · Cite this Guide
How to Cite This Guide
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