Federal Regulations for Providing Research Information at Appropriate Reading Comprehension Levels

The Direct Answer

As part of the consent process, federal regulations require researchers to provide potential subjects with information in language understandable to the subject or the subject’s legally authorized representative. In plain terms, consent materials should be written and explained at a reading comprehension level the potential participant can reasonably understand.

This requirement comes from the federal human-subjects research regulations at 45 CFR 46.116, often connected with the Common Rule. The rule does not say every consent form must use one exact grade level. Instead, it requires understandable language and a consent process that helps people decide whether they want to participate.

Informed consent is not just a signed form; it is a communication process built around understanding.

Why Understandable Language Matters

Research participation can involve risks, benefits, procedures, privacy issues, time commitments, alternatives, and rights. If potential subjects cannot understand those points, they cannot make a truly informed decision.

Understandable language protects people from agreeing to something they do not grasp. It also helps researchers build trust, reduce confusion, and meet ethical obligations.

Good consent communication avoids:

• Unexplained medical terms
• Dense legal language
• Long, confusing sentences
• Hidden risks
• Technical jargon
• Overly vague descriptions
• Pressure to decide quickly

The goal is not to make the study sound simple if it is complex. The goal is to explain complexity clearly.

What the Regulations Require

Federal regulations require that information given to a subject or legally authorized representative be in understandable language. The 2018 Common Rule revisions also emphasize that informed consent should begin with a concise and focused presentation of key information likely to help a reasonable person understand why they might or might not want to participate.

That means researchers should present the most important information early and clearly.

Requirement	What It Means
Understandable language	Write and speak at the participant’s comprehension level
Key information first	Start with the decision-making essentials
Opportunity to discuss	Let subjects ask questions
No coercion	Avoid pressure or undue influence

What Potential Subjects Should Understand

A potential research subject should understand the basic purpose of the study, what will happen, how long participation will take, what risks exist, what benefits may or may not occur, and whether there are alternatives.

They should also understand that participation is voluntary. In most research, people may refuse to join or withdraw later without losing rights or benefits they are otherwise entitled to receive.

Important consent topics may include:

• Study purpose
• Procedures
• Expected duration
• Risks or discomforts
• Possible benefits
• Alternatives to participation
• Confidentiality
• Compensation or costs
• Injury information when relevant
• Contact information
• Voluntary participation

Reading Level Is Not the Only Issue

Reading level matters, but comprehension is broader than grade-level formulas. A consent form could score at a low reading level and still be confusing if it is disorganized, misleading, or missing important context.

Researchers should consider the audience. A consent form for medical specialists may look different from a consent form for children, older adults, non-English speakers, people with limited literacy, or people under stress.

Formatting also helps. Short paragraphs, headings, bullets, white space, and plain explanations can make consent materials easier to understand.

Examples of Clearer Consent Language

Clear consent writing replaces technical wording with plain explanations without changing the meaning.

Harder Wording	Clearer Wording
You may experience adverse events.	You may have side effects or problems from the study procedure.
Participation is voluntary.	You can choose whether to join the study.
Confidentiality will be maintained.	We will protect your personal information as described below.
You may withdraw at any time.	You can leave the study later if you change your mind.

The clearer version is not less professional. It is more useful.

Special Situations

Some studies involve people who need additional protections. Federal regulations include extra rules for certain groups, such as children, prisoners, and pregnant people in specific research contexts.

For children, researchers may need parental permission and the child’s assent when appropriate. For people who cannot legally consent for themselves, a legally authorized representative may be involved.

In all cases, the same core idea remains: the person making the decision should receive information in a way they can understand.

What Researchers Should Do in Practice

Researchers should treat consent as a conversation, not a paperwork task. A good process gives the person time to read, ask questions, discuss with family or advisors if appropriate, and decide without pressure.

Practical steps include:

• Use plain language.
• Define necessary technical terms.
• Put key information first.
• Use translated materials when needed.
• Check understanding with open-ended questions.
• Avoid rushing the decision.
• Keep the consent form consistent with the study protocol.

Final Takeaway

Federal regulations require researchers to provide potential subjects with consent information in language they can understand. The rule is about meaningful comprehension, not just formal disclosure.

A consent form that people cannot understand does not serve the purpose of informed consent. The ethical and regulatory goal is simple: help people know what they are agreeing to before they decide.