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IB DP Psychology — Concepts: Responsibility | SL & HL | Paper 1
🎯 Learning Intentions By the end of this note, you will be able to:
- Define the term "special populations" in the context of psychological research ethics.
- Explain why certain groups require additional ethical safeguards beyond standard research protocols.
- Describe the key ethical principles — informed consent, protection from harm, confidentiality, and the right to withdraw — as they apply to vulnerable participants.
- Evaluate research involving special populations using supporting and opposing evidence in ACAS format.
- Apply ethical reasoning to a real-world case study involving a vulnerable participant group.
- Discuss the tension between advancing psychological knowledge and protecting the welfare of vulnerable participants.
- Analyse research ethics using the concept areas of Responsibility, Bias, and Perspective.
Introduction & Context
Imagine a researcher wants to study how stress affects memory in young children. The children cannot fully understand what the study involves, cannot predict how it might make them feel, and cannot independently decide whether to participate. Now imagine the same study conducted with adults who have a severe intellectual disability, or with prisoners who may feel subtle pressure to cooperate with authority figures. In each case, something important is at stake — not just the validity of the research, but the wellbeing and dignity of the people involved.
Psychology has a complicated history with vulnerable participants. Some of the most influential studies in the discipline — studies that shaped our understanding of obedience, attachment, and stress — were conducted in ways that would be considered unacceptable today. This history is not simply a record of bad decisions; it is the reason that modern ethical frameworks exist. Understanding why certain populations require special protection is not just a matter of following rules — it is about understanding what it means to treat human beings with genuine respect.
The concept of "special populations" in research ethics refers to groups whose circumstances make them more susceptible to harm, coercion, or exploitation in research contexts. These groups include, but are not limited to, children and adolescents, people with cognitive or intellectual disabilities, prisoners and detainees, elderly individuals with diminished capacity, people experiencing acute mental health crises, and individuals in dependent relationships with the researcher. What unites these groups is not a single characteristic but a shared vulnerability — a reduced ability to protect their own interests within the research relationship.
🔍 Analogy — The Power Imbalance in Research Think of the researcher-participant relationship as similar to a doctor-patient relationship. A doctor holds expertise, authority, and information that the patient does not. We do not simply trust that doctors will act well — we have professional codes, regulatory bodies, and legal frameworks to ensure they do. The same logic applies to research: the more vulnerable the participant, the more robust the safeguards need to be. Just as a paediatric doctor follows different protocols than one treating adults, a researcher working with children must apply a higher standard of care than one working with fully autonomous adults.
Core Concepts
Before we can understand what makes research with special populations ethically complex, we need to understand the foundational ethical principles that govern all psychological research. These principles were not invented arbitrarily — they emerged from specific historical abuses, from philosophical traditions about human dignity, and from practical experience of what goes wrong when researchers prioritise knowledge over welfare. Once we understand these principles clearly, we can examine how and why they become more demanding when applied to vulnerable groups.
📖 Key Definition — Informed Consent Informed consent is the process by which a potential participant is given clear, comprehensible information about the nature, purpose, risks, and benefits of a study, and voluntarily agrees to participate without coercion or undue pressure. For consent to be genuinely informed, the participant must have the cognitive capacity to understand the information provided, the freedom to refuse without negative