What you'll learn
Research involves real people, and the obligations that follow are not optional courtesies but conditions of the work being legitimate at all. This topic covers the ethical principles governing research — informed consent, voluntary participation, confidentiality and anonymity, the right to withdraw, protection from harm, and honesty about deception — with the particular care required when respondents are minors. It also covers limitations: what they are, how they differ from delimitations, the standard sources of limitation in a student study, and how to write about them in a way that strengthens rather than weakens a report. Both are assessed sections of the Internal Assessment.
Key terms and definitions
Research ethics — the moral principles governing how research is conducted, particularly the treatment of participants.
Informed consent — agreement to participate given freely, by someone who understands what the study involves, what will happen to their data, and that they may decline.
Voluntary participation — participation freely chosen, with no pressure, inducement or penalty for refusal.
Right to withdraw — a participant's entitlement to stop taking part at any point, and to have their data removed, without giving a reason.
Confidentiality — an undertaking that what a participant says will not be shared in a way that identifies them.
Anonymity — a stronger condition in which the researcher cannot identify who gave which response at all.
Protection from harm — the obligation to ensure participation causes no physical, psychological, social or reputational damage.
Deception — withholding or misrepresenting the purpose of research. Ethically problematic and inappropriate in a school study.
Gatekeeper — a person whose permission is needed to access participants, such as a principal, employer or community leader.
Limitation — a constraint the researcher did not choose, which restricts what the study can claim.
Delimitation — a boundary the researcher deliberately set, and can justify.
Bias — any influence that systematically distorts the data or its interpretation.
Social desirability bias — the tendency of respondents to give answers they believe are acceptable rather than accurate.
Generalisability — the extent to which findings can legitimately be applied beyond the sample studied.
Core concepts
The core ethical principles
Informed consent requires that participants know what they are agreeing to before they agree. They should be told who is conducting the study, its purpose, what participation involves, roughly how long it will take, what will happen to their responses, and that they may decline or stop. Consent obtained by explaining nothing is not consent.
Voluntary participation means no pressure. A student asked by a teacher in front of a class may not feel free to refuse, so the way a request is made matters as much as its wording. Inducements large enough to override judgement compromise voluntariness too.
The right to withdraw must be real and stated in advance, including the right to have data already given removed. It should be honoured without argument.
Confidentiality and anonymity are distinct and often confused. Confidentiality means you know who said what but will not reveal it. Anonymity means you cannot know — an unsigned questionnaire returned to a collection box is anonymous, whereas an interview never can be, since you were in the room. Promise only what you can deliver: undertaking anonymity in an interview is a promise you cannot keep.
Protection from harm extends well past physical safety. Questions about family circumstances, income, religion, ethnicity or experience of crime can cause distress or expose someone socially if answers are traced back. Consider before asking whether the question is necessary to your research problem; if it is not, remove it.
Honesty about purpose. Deception is sometimes defended in professional research where knowing the aim would invalidate the results, but it requires formal approval and is not appropriate in a school study. Describe your purpose accurately.
Additional obligations when respondents are minors
Most CAPE candidates research fellow students, and the fact that respondents are under eighteen changes the requirements.
Permission is needed from the school, and depending on the topic and the school's policy, from parents or guardians as well. The student's own agreement is still required — parental permission does not substitute for the participant's willingness, only adds to it. Language must be appropriate to age, since consent given without comprehension is not informed. And topics likely to cause distress should be avoided or handled with the guidance of a teacher.
Approaching gatekeepers early is practical as well as ethical: a study that cannot obtain permission cannot proceed, and discovering that late costs the whole project.
Handling data responsibly
Completed questionnaires and recordings should be stored securely and not left where others can read them. Names should be replaced with labels — Respondent A, Respondent B — as soon as the data is transcribed. Data should be used only for the stated purpose, and destroyed or securely retained after the study as agreed. Findings must be reported honestly: inventing, altering or omitting inconvenient data is a serious breach and a form of academic dishonesty, as is presenting others' work or words as your own without acknowledgement.
Ethics in how you write
Ethical obligation extends into the write-up. Respondents' practices should be described in their own terms rather than judged against the researcher's, which is cultural relativism applied to reporting. Where research touches ethnicity, religion or family form, wording that implies deviance from a norm is both inaccurate and penalised — describing a family structure as "broken" rather than naming the form is the standard example.
Communities should not be described in ways that would embarrass or stigmatise them, particularly where a small community is identifiable even without being named.
Limitations, and how they differ from delimitations
The distinction is examinable and routinely muddled.
Delimitations are choices you made. Studying one school, one form group, one three-week period, one aspect of a broad issue. These are defensible design decisions, and stating them shows control.
Limitations are constraints you did not choose but which restrict what the study can claim. They should be acknowledged honestly, because a report that claims more than its evidence supports is weaker than one that states its boundaries.
The standard limitations in a student study
Sample size and representativeness. Small samples, and non-probability samples in particular, describe those studied and do not license claims about a wider population.
Response rate. Where many did not reply, those who did may differ systematically from those who did not, so the achieved sample may no longer reflect the population.
Self-report bias. Respondents may not recall accurately, and social desirability bias leads them to give acceptable rather than honest answers — a particular risk on questions about behaviour, attendance, spending or attitudes towards authority.
Researcher effects. In interviews, respondents may adjust answers to please. In observation, people behave differently when watched. In analysis, the researcher's expectations can shape which findings seem important.
Time and access. A term is short. Some respondents will be unavailable, and some permissions will not be granted.
Instrument limitations. Closed questions restrict answers to the options offered, so an unanticipated view is invisible. Operational definitions capture part of a concept and miss the rest.
Writing the limitations section well
Three rules distinguish a strong limitations section from a formulaic one.
Be specific. "A convenience sample of thirty students from two Form 5 classes means findings cannot be generalised beyond this school" is worth considerably more than "the sample was small".
State the effect, not just the constraint. Say what the limitation means for the claims — which conclusions are weakened, and in which direction the bias probably runs.
Do not apologise excessively or undermine your own work. A limitation honestly identified and its effect explained demonstrates evaluative awareness. A section listing every conceivable shortcoming suggests the researcher does not know which ones matter.
Worked examples
Example 1: Identifying ethical problems
Question: "A student plans to observe classmates without telling them, and to name the school and individual students in the report. Identify the ethical problems and recommend improvements." (10 marks)
Outline. Three problems. First, covert observation cannot obtain informed consent, since participants do not know they are being studied and cannot decline. Second, naming individuals breaches confidentiality and could expose them socially, particularly where the behaviour observed is sensitive. Third, naming the school makes individuals identifiable even if their names were removed, in a setting where the population is small.
Recommendations: use overt observation with the knowledge of participants and the permission of the school, accepting the observer effect as a stated limitation; replace names with labels such as Respondent A throughout; and refer to the setting generically, as "a secondary school in [district]". Add that where respondents are minors, school permission is required and parental consent may be as well.
Example 2: Distinguishing limitations from delimitations
Question: "Distinguish between a limitation and a delimitation, giving one example of each from a school-based study." (6 marks)
Outline. A delimitation is a boundary the researcher deliberately set and can justify — for example, restricting the study to Form 5 students at one named school because they are the group the research question concerns and are accessible within the time available. A limitation is a constraint the researcher did not choose, which restricts what the study can claim — for example, a response rate of forty per cent, meaning those who replied may differ systematically from those who did not and the achieved sample may no longer reflect the year group. The distinction is between a choice and a constraint, and both should be stated, but in different sections and for different reasons.
Example 3: Writing a limitation properly
Question: "Rewrite the following limitation so that it would earn full marks: 'The sample was small so the results may not be accurate.'" (6 marks)
Outline. The original names a constraint without specifying it or its effect. A stronger version: "The study used a convenience sample of thirty Form 5 students from two classes, drawn from a year group of approximately one hundred and forty. Because respondents were not randomly selected, students who were present and willing may differ from those who were not — most likely being more engaged with school activities, which is the subject of the research. The findings therefore describe these thirty respondents and cannot be generalised to the year group or the school." That version specifies the sample, identifies the likely direction of bias, and states precisely what the findings can and cannot support.
Common mistakes and how to avoid them
Promising anonymity in an interview. You cannot deliver it; you can offer confidentiality. Promise only what is possible.
Treating consent as a formality. Consent requires that the participant understands what they are agreeing to. A signature obtained without explanation is not informed consent.
Forgetting that respondents are minors. School permission is required, parental consent may be, and the participant's own agreement is still necessary.
Proposing covert observation. It cannot secure consent and is inappropriate for a school study.
Confusing limitations with delimitations. Choices you made are delimitations; constraints you did not are limitations.
Writing vague limitations. "The sample was small" states nothing useful. Name the sample, the effect and the direction of likely bias.
Listing every conceivable limitation. This reads as insurance rather than judgement. Identify the ones that genuinely affect your claims.
Ethnocentric language in the write-up. Describing a family form or cultural practice as deviant rather than naming it accurately is penalised in Module 3 as elsewhere.
How this links to your Internal Assessment
Ethical considerations and limitations are both assessed sections, and both are frequently written thinly at the end when time has run out — which is a straightforward waste of available marks.
Deal with ethics before collecting data, not after. Secure permission from the school, prepare a short statement of purpose to read or hand to respondents, decide how you will label rather than name people, and plan where completed instruments will be stored. Then write the section describing what you actually did, which reads far more convincingly than a list of principles.
Record limitations as they arise rather than reconstructing them at the end. When a class is unavailable, when a batch of questionnaires comes back incomplete, when a question turns out to be ambiguous — note it at the time. Those specific, dated observations produce a limitations section with real content.
Exam technique for ethics and limitations in research
Learn the principles by name — informed consent, voluntary participation, right to withdraw, confidentiality, anonymity, protection from harm — and be able to define each in one sentence.
Distinguish confidentiality from anonymity every time. It is the single most frequently tested pair in this topic.
For "identify the ethical problems" questions, work through the principles as a checklist. Consent, voluntariness, confidentiality, harm and honesty will between them cover almost any scenario you are given.
Always pair a problem with a remedy. Questions in this topic usually ask for improvements as well as faults, and half the marks sit in the recommendation.
Write limitations with specificity and effect. Name the constraint, say what it does to the claims, and indicate which direction any bias probably runs.
Quick revision summary
Research ethics require informed consent, given freely by someone who understands what participation involves; voluntary participation without pressure or inducement; a real and stated right to withdraw; confidentiality, meaning you will not reveal who said what; anonymity, the stronger condition in which you cannot know, and which an interview can never offer; protection from physical, psychological, social and reputational harm; and honesty about purpose, since deception is inappropriate in a school study. Where respondents are minors, school permission is required, parental consent may be, and the participant's own agreement remains necessary. Data must be stored securely, names replaced with labels, findings reported honestly, and communities described without stigma or ethnocentric language. Delimitations are boundaries you chose and can justify; limitations are constraints you did not choose, and include small or non-probability samples, low response rates, self-report and social desirability bias, observer and interviewer effects, time and access constraints, and the restrictions built into your instrument. A strong limitations section is specific, states the effect on the claims and the likely direction of bias, and identifies the constraints that genuinely matter rather than listing every possibility.