Informed Consent in Research – Meaning, Requirements, Examples

Informed consent in research is a voluntary decision to participate, made by a person who has received and understood the information needed to make that decision. It is an ongoing communication process—not simply a signed form—and normally explains the study’s purpose, procedures, risks, possible benefits, privacy arrangements and the participant’s rights.

Introduction

Informed consent is one of the foundations of ethical research involving people. It allows prospective participants to decide whether a study is acceptable to them instead of leaving that decision entirely to researchers, universities, hospitals or sponsors.

This article explains what informed consent means, what makes consent valid, what information participants should receive and how the process should be documented. It also covers waivers, children, adults with impaired capacity, deception, online research, electronic consent, artificial intelligence and differences among U.S., U.K. and international frameworks.

Key takeaways

• Informed consent is a process of communication and voluntary decision-making, not merely a signature.
• Valid consent normally requires adequate information, understanding, capacity and freedom from coercion or undue influence.
• Written consent is common, but verbal, electronic or other forms may be appropriate when approved.
• A waiver of a signature is not the same as a waiver of the entire consent process.
• Participants may stop taking part, although removal of data already anonymized or incorporated into analysis may not always be possible.
• Researchers must follow the requirements of their ethics committee, institution and jurisdiction.

What Is Informed Consent in Research?

Informed consent is the voluntary agreement of a person with decision-making capacity to participate in research after receiving, considering and understanding the information relevant to that choice.

Three functions are central:

1. Disclosure: The researcher communicates the information a reasonable person would need.
2. Understanding: The information is presented in a form the prospective participant can comprehend.
3. Voluntariness: The decision is made without coercion, improper pressure or an unacceptable penalty for refusing.

U.S. federal guidance describes informed consent as a communication process that begins with the initial approach to a prospective participant and may continue until the study is complete (HHS OHRP, n.d.). The 2024 Declaration of Helsinki likewise treats free and informed consent as an essential expression of respect for autonomy in medical research (World Medical Association, 2024).

Informed Consent Is More Than a Form

A consent form records and supports the process, but it cannot replace a genuine conversation or understandable explanation.

A participant may sign a technically complete document without understanding it. Conversely, an ethics committee may approve a well-documented verbal or electronic process without requiring a handwritten signature. The ethical question is therefore not only, “Was the form signed?” It is also:

• Was the correct person asked?
• Was the relevant information disclosed?
• Was it communicated accessibly?
• Did the person understand the decision?
• Were questions answered?
• Was the choice voluntary?
• Was consent obtained before research procedures began?
• Was the participant kept informed of important changes?

Why Is Informed Consent Important?

Informed consent protects autonomy, dignity and welfare by giving people meaningful control over whether and how they participate in research.

Its main purposes are to:

• Respect the participant as an autonomous person.
• Reduce the risk of exploitation, deception and unwanted intrusion.
• Make risks, burdens and uncertainties transparent.
• Clarify what participation will involve.
• Explain how data, recordings or biological samples will be used.
• Establish that participation is voluntary.
• Provide a route for questions, complaints and withdrawal.
• Build trust between participants, researchers and institutions.

Informed consent does not make a poorly designed or excessively risky study ethical. A study also needs scientific or scholarly value, a defensible risk–benefit balance, fair participant selection, privacy protection and independent ethics review where required.

What Makes Informed Consent Valid?

A valid process normally contains five interconnected conditions.

Condition	Meaning	Warning sign
Adequate disclosure	Material information about the study is communicated honestly.	Important risks, recordings or secondary uses are hidden.
Understanding	The person comprehends the main information relevant to the decision.	The form is technical, rushed or untranslated.
Decision-making capacity	The person can understand, evaluate and communicate a choice.	Capacity is assumed solely from age, diagnosis or appearance.
Voluntariness	The decision is free from coercion and unacceptable influence.	A lecturer recruits dependent students without safeguards.
Affirmative agreement	The participant clearly indicates agreement before participation.	Silence, inactivity or a pre-ticked box is treated as consent.

Adequate Disclosure

Researchers must provide enough relevant information for an informed decision. More information is not automatically better. Extremely long documents can obscure the points that matter most.

Information should be proportionate to the study. A brief anonymous questionnaire may require a short, focused disclosure. A first-in-human clinical trial may require detailed explanations of uncertainty, procedures, alternatives, possible injuries and follow-up.

Understanding

Researchers should communicate in plain language and use a format appropriate to the intended population. Depending on the study, this may involve:

• Translated materials.
• Qualified interpreters.
• Audio or video explanations.
• Large-print or screen-reader-compatible documents.
• Diagrams and timelines.
• Short sections with descriptive headings.
• Opportunities to discuss the study.
• Teach-back questions asking the person to explain key points in their own words.

A reading-age score can help identify complex language, but it does not prove understanding. Researchers should also examine sentence structure, layout, numeracy, cultural meaning and the participant’s opportunity to ask questions.

Decision-Making Capacity

Decision-making capacity is the ability to understand relevant information, appreciate how it applies to one’s situation, compare options and communicate a choice.

Capacity is:

• Specific to the decision.
• Potentially changeable over time.
• Not automatically absent because a person has a disability, mental-health diagnosis, neurological condition or low literacy.
• Different from merely agreeing with the researcher.

Where capacity is uncertain, researchers should follow an approved assessment procedure and applicable law. Supported decision-making, accessible information and additional time may enable some individuals to decide for themselves.

Voluntariness

A voluntary choice is made without threat, force, deception about material facts or inappropriate pressure.

Researchers should pay particular attention to relationships such as:

• Lecturer and student.
• Employer and employee.
• Doctor and patient.
• Prison official and prisoner.
• Caregiver and dependent person.
• Aid provider and recipient.
• Senior researcher and junior employee.

Payment is not automatically unethical. The amount, context, inconvenience, economic circumstances and study risk should be reviewed to determine whether the offer might unduly influence the decision.

Affirmative Agreement

Agreement should be expressed clearly. Depending on the approved process, it may be shown through:

• A handwritten signature.
• An electronic signature.
• A recorded verbal statement.
• A checked consent box.
• Completion of a questionnaire after an explicit consent statement.
• Another affirmative action approved by the ethics committee.

Silence or failure to opt out is usually a weak basis for claiming that a person actively agreed.

What Information Should an Informed Consent Form Contain?

A research consent form should explain what the study is, what the person will do, foreseeable risks and benefits, alternatives where relevant, privacy arrangements, voluntary participation, withdrawal and whom to contact.

The exact requirements depend on the study and jurisdiction, but the following elements provide a strong general framework.

Element	What to explain
Research identification	State clearly that the activity is research.
Purpose	Explain what the study is trying to find out and why.
Eligibility	Explain why the person has been approached where useful.
Procedures	Describe tasks, interviews, tests, interventions, recordings or specimen collection.
Duration	State the length of each activity and total participation period.
Experimental features	Identify procedures that are investigational or assigned by research.
Risks and discomforts	Include reasonably foreseeable physical, psychological, social, legal, economic or privacy risks.
Expected benefits	Describe possible direct benefits and benefits to others without exaggeration.
Alternatives	For treatment research, explain relevant non-research alternatives.
Confidentiality	Explain who can access identifiable information and how it will be protected.
Data and sample use	Explain storage, retention, sharing, future research, commercial use and limits on withdrawal.
Payment and costs	Explain compensation, expenses, participant costs and payment following withdrawal.
Research-related injury	Where applicable, explain available care, compensation or contacts.
Voluntary participation	State that refusal will not cause an improper penalty or loss of entitled benefits.
Withdrawal	Explain how to stop, any consequences and what may happen to existing data.
New information	Explain whether important new findings will be shared during the study.
Contacts	Give contacts for study questions, participant rights, complaints and injuries where relevant.
Consent statement	Record the person’s voluntary decision using the approved method.

U.S. FDA regulations specify basic elements for FDA-regulated clinical investigations, including the research purpose, duration, procedures, foreseeable risks, expected benefits, alternatives, confidentiality, injury information where applicable, contacts and voluntariness (Food and Drug Administration, 2023).

Risks Should Not Be Limited to Physical Harm

Social and behavioral research may create risks such as:

• Emotional distress.
• Embarrassment.
• Damage to reputation.
• Disclosure of immigration status.
• Employment or educational consequences.
• Family or community conflict.
• Legal exposure.
• Re-identification of supposedly anonymous information.
• Unauthorized access to recordings or sensitive datasets.

The form should describe study-specific risks rather than relying only on vague wording such as “there are no risks.” Even minimal-risk research may involve inconvenience, fatigue or a confidentiality risk.

Benefits Must Not Be Exaggerated

Researchers should distinguish among:

• Direct benefit to the participant, such as a possible improvement from an intervention.
• Indirect benefit, such as contributing to knowledge.
• No expected personal benefit.

Payment is compensation or reimbursement, not normally a research benefit. Completing a questionnaire should not be presented as treatment, diagnosis or guaranteed personal improvement unless the protocol genuinely provides those services.

How to Obtain Informed Consent: Step by Step

Researchers obtain informed consent by preparing approved materials, giving the prospective participant understandable information, checking understanding, supporting questions, confirming voluntariness, recording the decision and continuing communication throughout participation.

1. Design the Consent Process Early

Plan consent while developing the research protocol—not after recruitment materials have already been prepared.

Identify:

• Who will approach participants.
• Where and when the conversation will occur.
• Whether privacy can be maintained.
• Languages and accessible formats required.
• How capacity will be considered.
• Whether a parent, guardian, consultee or legally authorized representative may be involved.
• How consent will be recorded.
• When re-consent may be needed.

2. Obtain Ethics Approval Before Recruitment

Submit the participant information, consent materials, recruitment messages and proposed process to the relevant IRB, REC or equivalent body when review is required.

Researchers should not begin using an unapproved form merely because it contains standard wording. Study-specific risks, data uses and participant characteristics must be reviewed.

3. Approach Participants Fairly

Recruitment should avoid misleading claims, excessive pressure and unjustified exclusion.

Where a power imbalance exists, consider safeguards such as:

• Recruitment by an independent person.
• Delaying disclosure of who volunteered until grades are finalized.
• Providing an equivalent non-research alternative.
• Making clear that clinical care, employment or benefits will not depend on participation.

4. Present the Key Information First

Begin with the information most likely to affect the decision:

• Why the person is being invited.
• The study’s purpose.
• What participation involves.
• Major risks and burdens.
• Whether personal benefit is expected.
• Important alternatives.
• Voluntary participation.
• Data and sample use.
• Withdrawal limits.

Supporting detail can follow in a logical order.

5. Allow Time and Questions

The time needed depends on the study. A low-burden online survey may require only a brief review. Complex clinical, genomic or longitudinal research may require discussions, time to consult family members and more than one meeting.

The person should know whom to contact after the initial conversation.

6. Assess Understanding Proportionately

For complex or higher-risk studies, do more than ask, “Do you understand?”

Useful questions include:

• “What will happen if you join?”
• “What are the main risks?”
• “Can you stop taking part?”
• “What will happen to your samples?”
• “What other options do you have?”

A wrong answer should prompt further explanation, not automatic exclusion.

7. Confirm Voluntariness

Ask whether the person feels pressured or believes refusal could affect services, grades, employment, immigration status or clinical care.

Correct any misunderstanding immediately.

8. Record the Decision

Use the method approved by the ethics committee. Ensure that required names, dates, signatures, witnesses or electronic records are complete.

Give the participant a copy or accessible record when required or appropriate.

9. Continue the Process

Consent may need to be revisited when:

• New risks become known.
• Procedures change.
• Data-sharing plans change.
• A study is extended.
• A child reaches the age at which their own legal consent is required.
• A participant’s capacity changes.
• New findings could affect willingness to continue.

Consent Process Versus Consent Form

Consent process	Consent form
The complete interaction through which a person learns, asks questions and decides.	A document or electronic record supporting and documenting the interaction.
May continue throughout the study.	Usually completed at a defined point and updated when necessary.
Focuses on communication, understanding and voluntariness.	Focuses on accurate disclosure and evidence of agreement.
Can include conversation, video, diagrams, interpreters and questions.	Can be paper, electronic, short-form or another approved format.
Cannot be replaced by a signature.	A signature alone does not prove informed understanding.

Types of Consent and Consent Documentation

Written Consent

Written consent normally involves an approved document signed and dated by the participant or an authorized representative.

It is common in clinical trials, invasive studies, identifiable longitudinal research and projects involving more than minimal risk.

Verbal Consent

Verbal consent may be suitable when:

• A signature would create a confidentiality risk.
• Participants have difficulty reading or writing.
• The research occurs by telephone.
• Cultural norms make signing inappropriate.
• The study is minimal risk and the ethics committee approves the method.

Researchers may need a script, witness or written record of the conversation.

Implied Consent

In some low-risk surveys, consent may be indicated by voluntarily continuing after reading a clear information statement.

This should not be confused with passive consent. The person should take an affirmative action that reasonably communicates agreement. The ethics application should explain why the method is appropriate.

Electronic Consent

Electronic informed consent, or eConsent, uses digital tools to present information and document agreement. It may include:

• Electronic forms.
• Digital signatures.
• Videos or animations.
• Audio narration.
• Interactive diagrams.
• Knowledge checks.
• Remote video discussions.
• Downloadable copies.

Electronic systems should protect privacy, preserve records, support accessibility and comply with applicable electronic-record and signature requirements.

Parental Permission and Child Assent

Children commonly provide assent, while a parent or guardian provides legally required permission.

Assent means an affirmative, developmentally appropriate agreement to participate. A child’s silence or failure to resist should not automatically be treated as assent.

The child should receive information they can understand, including:

• What will happen.
• Whether anything may hurt or feel uncomfortable.
• That questions are welcome.
• Whether they can say no or ask to stop.

Rules vary by age, jurisdiction, study type and the child’s circumstances.

Proxy or Representative Consent

When an adult cannot provide legally valid consent, applicable law may allow a legally authorized representative to decide.

The representative should consider the person’s known wishes, values and interests. Researchers should still involve the participant as much as possible and respect meaningful resistance or objection unless an ethically and legally justified exception applies.

Broad Consent

Broad consent may authorize specified categories of future research using identifiable information or biospecimens without requiring a new study-specific decision every time.

It is not unlimited or vague permission. A broad-consent process should explain:

• Types of future research.
• Information or specimens covered.
• Storage duration.
• Possible data or sample sharing.
• Whether commercial research is possible.
• Governance and privacy protections.
• Whether results will be returned.
• Withdrawal procedures and limits.

Dynamic Consent

Dynamic consent uses an ongoing digital interface through which participants can receive updates, adjust preferences and sometimes make separate choices about future uses.

It may be useful for biobanks and longitudinal research, but it can also create digital-access burdens, repeated notifications and unrealistic expectations that every downstream use can be individually controlled.

U.S., U.K. and International Frameworks

Context	Key framework	Practical emphasis
United States	Common Rule requirements in 45 CFR part 46; FDA requirements in 21 CFR part 50 for FDA-regulated clinical investigations	Key information, understandable presentation, voluntariness, required elements, IRB-approved waivers or alterations and documentation
United Kingdom	Applicable law, REC/HRA guidance, clinical-trial rules, U.K. GDPR and the Data Protection Act	Proportionate and accessible participant information, clear affirmative agreement, lawful data processing and distinction between research consent and GDPR lawful basis
International research	Local law and ethics review, supported by principles in the 2024 Declaration of Helsinki, CIOMS guidelines and WHO materials	Respect for autonomy, local relevance, community engagement, vulnerability, fair partnerships and culturally appropriate communication

United States

The Common Rule requires informed consent information to be presented in sufficient detail and organized to facilitate understanding. It also provides criteria under which an IRB may approve a waiver or alteration.

FDA-regulated clinical investigations are additionally governed by FDA requirements. Researchers must determine which rules apply rather than assuming that one university template satisfies every federal, state, tribal or local requirement.

United Kingdom

Current HRA guidance promotes a proportionate approach: the amount and method of information should reflect the study’s complexity, risks, burdens, benefits and ethical issues (Health Research Authority, 2026).

Researchers should also distinguish ethical consent to participate from the lawful basis used to process personal data. Under U.K. data-protection guidance, universities and public health bodies may rely on public task, while other organizations may use another lawful basis. Ethical consent remains important even when “consent” is not the selected U.K. GDPR lawful basis (Information Commissioner’s Office, n.d.).

International and Multicountry Research

International guidelines do not replace national law or local ethics review. Researchers should address:

• Local languages and decision-making practices.
• Community consultation without replacing individual choice.
• Differences in legal adulthood and representative authority.
• Local standards of care.
• Data transfers across borders.
• Exploitation and unequal benefit sharing.
• Compensation and research-related injury.
• Post-study access where relevant.
• Whether translated concepts have the intended cultural meaning.

Researchers should avoid assuming that a signature demonstrates valid consent in every setting.

Is Informed Consent Always Required?

Consent is the normal expectation for prospective research participation, but an authorized ethics committee may sometimes approve a waiver or alteration when specific legal and ethical criteria are met. Researchers cannot grant themselves a waiver.

Waiver of Documentation

A waiver of documentation means the participant receives the required information and agrees, but no signature is collected.

It may be considered where:

• The signed form would be the main link between identity and sensitive research.
• The research is minimal risk and similar non-research activities do not normally require signatures.
• Signing is culturally inappropriate and an alternative record is available.

Waiver of Consent

A full waiver allows research to proceed without obtaining the usual prospective informed consent.

Under the U.S. Common Rule, a general waiver or alteration ordinarily requires an IRB to find, among other things, that the research presents no more than minimal risk, could not practicably be carried out without the waiver or alteration, and would not adversely affect participants’ rights and welfare. Additional information should be provided afterward when appropriate.

Possible contexts include certain:

• Retrospective record studies.
• Secondary analyses.
• Minimal-risk evaluations.
• Cluster-level interventions.
• Deception studies using an approved alteration.
• Emergency research conducted under specialized rules.

Convenience, cost or fear of lower recruitment is not by itself a sufficient ethical justification.

Exempt Research

“Exempt” does not necessarily mean “no ethics responsibilities” or “no participant information.” Some exempt or low-risk projects still require prospective agreement, privacy protections or an abbreviated information statement.

Researchers should use their institution’s determination process instead of self-declaring an exemption.

Deception and Incomplete Disclosure

Deception may be ethically permissible only when justified by the study, risk is appropriately limited, no satisfactory non-deceptive method is available, and an ethics committee approves the alteration.

Researchers should not deceive participants about information that would reasonably affect their willingness to face serious harm.

A debriefing should normally:

1. Reveal the true purpose or withheld information.
2. Explain why deception was considered necessary.
3. Correct false beliefs.
4. Address distress or concerns.
5. Provide researcher and ethics contacts.
6. Explain any approved choice concerning use of the participant’s data.

The timing and content of debriefing should be specified in the protocol.

Informed Consent for Children and Young People

Research involving children often requires both parental permission and the child’s assent.

Materials should be adapted to:

• Age.
• Language.
• reading ability.
• Cognitive development.
• Study complexity.
• Emotional sensitivity.

A single simplified form may not suit a six-year-old and a sixteen-year-old. Researchers may need separate versions for different age groups.

When a long-term study continues after a participant reaches the applicable age of legal consent, the research team may need to obtain that participant’s own consent before further procedures.

Adults with Impaired or Fluctuating Capacity

Researchers should avoid excluding adults merely because consent requires additional effort. Exclusion can make evidence less relevant to populations affected by dementia, neurological conditions, intellectual disabilities or acute illness.

An ethical plan may include:

• Accessible materials.
• Communication aids.
• Familiar supporters.
• Repeated discussions.
• Assessment at an appropriate time of day.
• Legally authorized representation.
• Ongoing monitoring for assent, distress or objection.
• Re-consent if capacity is regained.

Capacity requirements and representative roles differ across jurisdictions.

Consent in Surveys, Interviews and Focus Groups

Online and Paper Surveys

A low-risk survey can begin with a concise information page explaining:

• The study purpose.
• Eligibility.
• Approximate completion time.
• Sensitive topics.
• Voluntary participation.
• Skipping questions.
• Data collection and identifiers.
• Withdrawal limits.
• Contacts.

A required “I agree to participate” option may document affirmative agreement. Whether a signature is necessary depends on the approved protocol.

Interviews

Interview consent should address:

• Audio or video recording.
• Transcription.
• Use of quotations.
• Attribution or pseudonyms.
• Potential identifiability from context.
• Topics that may cause distress.
• Whether participants can review quotations or transcripts.
• Data retention and future use.

A participant may agree to the interview but refuse recording. These should be separate choices where recording is not essential.

Focus Groups

Researchers cannot guarantee that other participants will keep the discussion confidential. The consent materials should explain this limitation.

The facilitator can request confidentiality and establish ground rules, but cannot fully control what group members later disclose.

Consent in Clinical Trials

Clinical-trial consent commonly requires additional information about:

• Randomization.
• Placebos or comparison groups.
• Experimental procedures.
• Foreseeable adverse effects.
• Treatment alternatives.
• Additional visits and tests.
• Contraception or pregnancy-related requirements where scientifically justified.
• Research-related injury.
• Costs and reimbursement.
• Early termination.
• New safety information.
• Trial registration and results information where applicable.

Researchers should avoid therapeutic misconception—the mistaken belief that every research decision is chosen solely to provide the individual participant with the best available treatment.

Secondary Data, Social Media and Public Information

The fact that information is technically public does not automatically settle the ethical question.

Researchers should consider:

• Whether users reasonably expected the context to be observed by researchers.
• Topic sensitivity.
• Group vulnerability.
• Identifiability through quotations.
• Platform terms.
• Scale of data collection.
• Whether contacting users would create additional harm.
• Whether paraphrasing is needed to prevent search-engine identification.
• Local law and ethics-review requirements.

Studies using de-identified existing data may not require individual consent in some circumstances, but the determination should follow institutional and legal procedures.

Biospecimens, Genetics and Future Research

Consent involving biological samples should address:

• What samples will be collected.
• Whether genetic analysis is planned.
• Storage location and duration.
• Future research.
• Sharing with other investigators.
• International transfers.
• Commercial development.
• Return of individual or incidental findings.
• Whether samples can be destroyed after withdrawal.
• Limits created by previous distribution or de-identification.

Researchers should avoid promising complete anonymity when genomic information or linked datasets may create residual re-identification risks.

Withdrawal from Research

Participants generally have the right to stop taking part without an improper penalty, but withdrawal does not always mean that all previously collected information can be erased.

A clear consent process should distinguish:

1. Stopping future visits or interventions.
2. Stopping further data collection.
3. Stopping contact.
4. Declining future use of samples.
5. Requesting destruction of remaining identifiable samples.
6. Requesting removal of existing data where possible.
7. Data that must be retained for safety, legal or research-integrity reasons.
8. Data already anonymized, aggregated, analyzed or shared.

Researchers should explain these limits before enrollment rather than only after a withdrawal request.

Confidentiality Is Not the Same as Anonymity

Anonymity	Confidentiality
The researcher does not collect information that can reasonably identify the participant.	The researcher may know or record identity but restricts access and disclosure.
Recontact and individual withdrawal may be impossible.	Recontact and withdrawal may remain possible while identifiers exist.
Indirect identifiers may still create re-identification risk.	Security measures, access controls and coding are required.

Researchers should not describe coded data as anonymous when a re-identification key exists.

Electronic Consent and Remote Research

Electronic consent can improve flexibility and allow participants to review information at their own pace. It can also support multimedia, remote discussion and accessible formats.

However, researchers should address:

• Identity and age verification.
• Data security.
• Electronic signatures.
• Version control.
• Time stamps and audit trails.
• Copies for participants.
• Accessibility.
• Device and internet inequality.
• Private opportunities to ask questions.
• Risks of family or employer observation.
• Procedures for technical failure.

FDA and HHS guidance permits electronic systems and multiple media when applicable requirements are satisfied (Food and Drug Administration & Office for Human Research Protections, 2016). U.K. guidance also recognizes electronic methods and clear affirmative actions, subject to the relevant legal and ethical framework (Health Research Authority, 2026).

Artificial Intelligence and Informed Consent

AI tools can assist researchers by:

• Identifying technical language.
• Suggesting plain-language alternatives.
• Producing draft summaries.
• Creating question-and-answer interfaces.
• Supporting accessible formats.
• Generating draft translations.
• Flagging inconsistencies across study documents.

Emerging studies have investigated conversational interfaces and comprehension checks as ways to encourage closer engagement with digital consent information (Xiao et al., 2023; Ma et al., 2026).

AI should not independently decide that a participant has capacity, that consent is valid or that an ethics requirement has been satisfied. It should also not receive confidential participant information unless the tool, data-processing arrangement and protocol authorize that use.

All AI-generated consent content should be checked by qualified humans for:

• Factual accuracy.
• Missing risks.
• False reassurance.
• Inconsistent withdrawal language.
• Cultural meaning.
• Translation accuracy.
• Accessibility.
• Privacy and security.
• Consistency with the approved protocol.
• Compliance with ethics-committee requirements.

An AI chatbot may support communication, but it does not replace researcher accountability or access to an appropriately knowledgeable person.

Advantages of Informed Consent

A well-designed consent process can:

• Protect autonomy.
• Improve transparency.
• Clarify expectations.
• Encourage questions.
• Reduce misunderstanding.
• Strengthen accountability.
• Help participants recognize risks and alternatives.
• Build trust.
• Document ethically relevant decisions.
• Support continuing communication.

Limitations of Informed Consent

Informed consent is essential but imperfect.

Common limitations include:

• Long and technical documents.
• Information overload.
• Low recall.
• Power imbalances.
• Cultural assumptions about individual decision-making.
• Uncertain future data uses.
• Difficult risk probabilities.
• Therapeutic misconception.
• Digital exclusion.
• Participants signing without reading.
• Excessive institutional focus on legal protection rather than understanding.

These limitations support improving the process, not abandoning it.

Common Informed-Consent Mistakes

Treating a Signature as Proof of Understanding

A signature records agreement; it does not demonstrate comprehension.

Using Technical or Legalistic Language

Terms such as “randomization,” “biospecimen,” “de-identification” and “placebo” should be explained in ordinary language.

Hiding Important Information in Long Documents

Key information should appear early and be easy to find.

Promising Complete Confidentiality

Researchers should disclose reasonable limits, including authorized audits, legal duties and focus-group risks.

Describing Payment as a Benefit

Payment should normally be presented separately from possible research benefits.

Saying That a Study Has No Risks

Researchers should consider inconvenience, distress and data risks even in minimal-risk studies.

Making Withdrawal Promises That Cannot Be Honored

Do not promise that anonymous or already distributed data can always be retrieved.

Combining Unrelated Choices

Participation, recording, future contact, sample storage and future data sharing may require separate choices.

Using an Unmodified Generic Template

A template must be adapted to the actual protocol, population, data flow and jurisdiction.

Collecting Data Before Consent

Eligibility screening, recordings or identifiable data collection may themselves be research activities requiring prior authorization or consent.

Copy-Ready Informed Consent Template

The following template is educational and must be adapted to the protocol and approved by the relevant institution or ethics committee.

Study title

[Insert the full study title.]

Invitation

You are invited to take part in a research study. Before deciding, please read the following information. Ask the research team about anything that is unclear.

Purpose of the research

The purpose of this study is to [explain the research question in plain language].

Why you have been invited

You have been invited because [brief eligibility explanation].

What participation involves

If you agree to participate, you will be asked to:

• [Activity one]
• [Activity two]
• [Any recording, testing, intervention or sample collection]

Participation will take approximately [time] and will continue for [total period].

Voluntary participation

Taking part is voluntary. You may refuse without [explain that there is no improper penalty or effect on entitled services, grades, employment or care]. You may stop participating at any time.

Risks or discomforts

Possible risks or discomforts include [study-specific explanation]. You may skip any question unless answering it is essential and this has been clearly explained.

Possible benefits

You may [receive/no receive] a direct personal benefit. The research may help [describe possible contribution without guaranteeing an outcome].

Alternatives

[For treatment or intervention research, describe appropriate alternatives. Otherwise state that the alternative is not to participate.]

Payment and costs

You will [receive/not receive] [amount or reimbursement]. Explain any participant costs and what happens to payment if participation ends early.

Privacy and confidentiality

The research team will collect [types of data]. Identifiable information will be accessible to [authorized people or organizations]. Data will be protected by [coding, encryption, restricted access or other measures].

Complete confidentiality cannot be guaranteed because [relevant limits].

Recordings and quotations

[Explain audio/video recording, transcription, quotation use and whether identity may be disclosed.]

Storage, sharing and future use

Your information or samples will be stored for [period]. They may be [shared/not shared] with [recipients] for [purposes]. Explain whether future research or commercial use is possible.

Withdrawal

You can stop taking part by contacting [contact]. Explain:

• Which activities will stop.
• Whether existing identifiable data can be removed.
• The withdrawal deadline, if any.
• Why anonymous, aggregated, analyzed or previously shared data may not be removable.

Questions or concerns

For questions about the study, contact:

[Researcher name, role, email and telephone]

For questions about your rights or complaints, contact:

[Independent ethics or institutional contact]

Consent statement

By [signing/checking the box/stating agreement], I confirm that:

• I have read or received the study information.
• I have had an opportunity to ask questions.
• I understand that participation is voluntary.
• I understand how to stop participating.
• I voluntarily agree to take part.

Participant name: ____________________

Signature or approved electronic/verbal record: ____________________

Date: ____________________

Researcher or witness, where required: ____________________

Example: Consent for an Online Student Survey

A postgraduate researcher wants to survey university students about study habits. The questionnaire is anonymous and takes approximately ten minutes.

A suitable opening page could state:

You are invited to complete an anonymous research survey about university study habits. Participation is voluntary and takes approximately ten minutes. The survey does not ask for your name or student number. Some demographic combinations could nevertheless make a response indirectly identifiable. You may skip non-required questions or close the survey before submission. Because responses are not linked to your identity, an individual response cannot be removed after submission. By selecting “I agree” and continuing, you confirm that you are at least 18, have read this information and voluntarily agree to participate.

The researcher should still submit the proposed process for the institution’s required ethics determination. The researcher should not assume that anonymity alone removes all consent or review obligations.

How to Report Informed Consent in a Research Paper

A methods or ethics section should state:

• Which ethics committee reviewed the study.
• Approval or reference number where required.
• Who provided consent.
• Whether consent was written, verbal or electronic.
• Whether assent and parental permission were used.
• Whether an approved waiver or alteration applied.
• How confidentiality and withdrawal were handled where relevant.

Example wording

The study received approval from the University Research Ethics Committee (reference: XXXX). Before each interview, participants received an information sheet explaining the study’s purpose, procedures, voluntary nature, confidentiality arrangements and withdrawal process. Written informed consent was obtained before recording began.

Example involving a waiver

The Institutional Review Board approved a waiver of informed consent for the retrospective analysis because the study met the applicable waiver criteria. The research team received only the minimum data required and applied the approved confidentiality safeguards.

Do not claim that consent was obtained when the ethics committee actually approved a waiver.

Researcher’s Informed-Consent Checklist

Before recruitment, confirm that:

• The consent process matches the approved protocol.
• The correct ethics review or determination has been obtained.
• Materials identify the activity as research.
• Key information appears first.
• Procedures and duration are accurate.
• Risks include privacy and social risks.
• Benefits are not exaggerated.
• Payment is described separately.
• Data, samples, recordings and future uses are explained.
• Withdrawal wording is realistic.
• Contact details are current.
• Materials are understandable and accessible.
• Translations have been checked.
• Power imbalances have been addressed.
• Consent is obtained before research procedures.
• The participant receives an appropriate copy or record.
• Re-consent triggers are documented.
• Electronic systems are secure and auditable.
• AI-generated wording has been reviewed by qualified humans.

Conclusion

Informed consent in research is a continuing process through which people receive understandable information and voluntarily decide whether to participate. A form can support and record that decision, but it cannot replace comprehension, questions and freedom of choice.

The most ethical approach is not necessarily the longest document. It is the process that gives each prospective participant the information, support, time and control reasonably needed for a genuine decision while meeting the applicable requirements of the study, institution and jurisdiction.