Informed Consent in Community Research: Individual, Collective and Ongoing

Ethics & partnerships · By the Common Inquiry editorial team · Published 2026-10-26

Close-up of a man's hand writing on a sheet of paper on a wooden table — Consent is a conversation before it is a signature. Photo: Olu Eletu, CC0, via Wikimedia Commons.

Informed consent is the most familiar rule of research ethics: people must understand what a study involves and agree freely to take part. In community research, consent becomes more complicated. Neighbours interview neighbours, groups as well as individuals can be affected, and studies change as they go. This guide covers the main questions and some practical solutions.

The basic elements

Whatever the jurisdiction, valid consent rests on three conditions: the person has the information they need, understands it, and agrees voluntarily. Regulations list required elements. In the United States, the Common Rule (45 CFR 46) requires, among other things, a statement that the study is research, its purposes and procedures, foreseeable risks and benefits, how confidentiality will be protected, and that participation is voluntary and can be stopped at any time. The revised rule, effective from January 2019, added a requirement that consent documents begin with a concise and focused presentation of the key information most likely to help a person decide.

Consent as a process

Participatory projects often unfold over months, with new activities added as the group's questions develop. A person who agreed to an interview in spring may later be asked to appear in a photograph or a video. Good practice treats consent as ongoing:

explain the project in a conversation, not only in writing;
check understanding by asking people to describe what they have agreed to in their own words;
seek fresh consent for each new activity or use, such as a public exhibition;
remind participants regularly that they can stop, and make stopping easy.

Literacy, language and oral consent

Long, technical consent forms exclude people. Projects working with communities where literacy or the dominant language is a barrier can:

write forms in plain language and test them with community members;
translate them and use trained interpreters, ideally from the community;
use oral consent, recorded by audio or by a witness's signature, where the ethics committee approves it;
use pictures or short videos to explain procedures.

Many ethics committees accept oral or recorded consent when a signature would itself create risk, for example where signing documents is associated with authorities, or where a signed form linking a name to a sensitive study would be dangerous if lost.

Individual and collective consent

Some research affects a whole group: a tribe, a village, a neighbourhood or an organisation. In such cases, international guidance recognises that researchers may need permission from community leaders or representative bodies before approaching individuals. The 2016 CIOMS guidelines and Canada's Tri-Council Policy Statement both discuss community engagement and, where appropriate, community agreement.

Two cautions apply. First, community permission never replaces individual consent: each person must still be free to refuse. Second, leaders do not always represent everyone, so projects should seek out other voices, especially those of people who might be marginalised within the group. Our article on research ethics with communities sets this in a wider context.

When community members collect consent

In participatory projects, co-researchers often recruit participants and obtain consent. This has clear advantages (trust, language, cultural understanding) and specific risks:

Pressure. People may find it hard to refuse a neighbour, a relative or a respected community figure. Training should cover how to make refusal easy.
Confidentiality. Co-researchers may learn private information about people they see every day. A confidentiality agreement and clear guidance on what to do with sensitive disclosures are essential.
Disclosures of harm. Agree in advance what co-researchers should do if someone reveals abuse, danger or a crime, and who in the team they should contact.
Support. Co-researchers should have someone to debrief with, particularly after difficult interviews.

Co-researchers' own roles, pay and rights deserve the same care; see paying community researchers.

Photographs, audio and video

Visual methods such as photovoice raise particular issues. Separate consent is usually needed for being photographed, for the photograph being shown within the group, and for public exhibition or publication. Images of children require consent from a parent or guardian and the child's own agreement. Projects should agree rules on photographing people in private spaces or vulnerable situations, and on blurring faces when consent cannot be obtained.

Withdrawal

Participants should be able to withdraw. Consent forms should explain what happens to data already collected: whether it can be removed, and until when. Once data are anonymised and combined, or once results are published, removal may no longer be possible; participants should be told this in advance.

Consent and data protection law

In the UK and the European Union, the General Data Protection Regulation requires a lawful basis for processing personal data. Universities and public bodies often rely on "public task" rather than consent as the lawful basis for research, combined with specific conditions for sensitive data used for research purposes. This does not remove the ethical requirement to obtain informed consent to take part; it means the two are separate. Consent forms should therefore explain both what participants are agreeing to do, and how their data will be handled under data protection law. The UK Information Commissioner's Office publishes guidance on research provisions.

Consent for future use

Projects increasingly want to archive data or reuse it. Options include specific consent (only for this study), broad consent (for future research within stated limits), tiered consent (participants choose among options) and "dynamic" consent (participants are contacted and choose for each new use). Whatever the model, be precise: the Havasupai case showed how damaging it is when communities discover uses they never imagined. Data agreements between partners, discussed in our guide to partnership agreements, should be consistent with what participants were told.

Sources

US Department of Health and Human Services, Federal Policy for the Protection of Human Subjects (45 CFR 46), revised 2018.
Council for International Organizations of Medical Sciences, International Ethical Guidelines for Health-related Research Involving Humans, 2016.
Tri-Council Policy Statement: Ethical Conduct for Research Involving Humans (TCPS 2, 2022), chapters 3 and 9.
Caroline C. Wang and Yanique A. Redwood-Jones, "Photovoice ethics: perspectives from Flint Photovoice", Health Education & Behavior, vol. 28, no. 5, 2001.
UK Information Commissioner's Office, guidance on the research provisions of the UK GDPR.