📚 AS Eduqas Psychology: Case Study Practical Workout | AS Eduqas心理学：案例分析实战演练
Case studies stand as one of the most powerful and intimate research methods in psychology, enabling researchers to dive deeply into the complexities of human behaviour, development and mental processes. Unlike large-scale surveys or tightly controlled experiments, a case study provides a rich, narrative-driven portrait of a real person or event, capturing nuances that statistics alone can miss. This Practical Workout guide is designed for AS Eduqas Psychology students to master the essential knowledge, iconic examples and evaluative skills needed to excel in both their understanding and examination of the case study method.
案例研究是心理学中最有力、最贴近个人的研究方法之一，使研究者得以深入探究人类行为、发展及心理过程的复杂性。与大规模调查或严格控制的实验不同，案例研究以丰富的叙事笔触描绘真实的人物或事件，捕捉统计数字难以传递的细腻之处。这份实战演练指南专为AS Eduqas心理学学生设计，旨在帮助你们掌握案例研究法的核心知识、经典范例与评估技能，从而在理解与考试中双双脱颖而出。
1. Introduction to Case Studies | 案例研究简介
A case study is a research method that involves an in-depth, detailed examination of a single individual, group, institution or event over a significant period. The aim is to gather rich, qualitative — and sometimes quantitative — data to gain a holistic understanding of the subject under investigation.
案例研究是一种研究方法，涉及对单个个体、群体、机构或事件进行长期深入的详尽考察。其目的在于收集丰富的定性数据（有时也包括定量数据），从而实现对研究对象整体性的理解。
In AS Eduqas Psychology, case studies are particularly valuable because they allow researchers to explore rare or unique phenomena that could never be reproduced ethically in a laboratory setting. Notable examples include cases of brain trauma, extreme isolation and unusual development, each providing a window into psychological processes that are otherwise inaccessible.
在AS Eduqas心理学中，案例研究尤其宝贵，因为它们使研究者能够探索那些从伦理上决不可能在实验室重现的罕见或独特现象。著名的例子包括脑损伤、极度孤立与不寻常的发展案例，每一个都为我们打开了一扇观察心理过程的窗户，而这些过程原本是无法触及的。
2. Key Features of a Case Study | 案例研究的关键特征
Case studies are characterised by the extensive use of triangulation — combining multiple data sources such as interviews, observations, diaries, family records and psychometric tests. This multi-method approach increases the richness and validity of the findings.
案例研究的标志性特征是广泛使用三角验证——结合多种数据来源，如访谈、观察、日记、家庭记录和心理测量问卷。这种多方法的取向增加了研究发现的丰富性与效度。
Unlike experiments, case studies are longitudinal and idiographic in nature, focusing on the unique configuration of influences in one case rather than seeking universal laws. The researcher often becomes deeply immersed in the participant’s world, producing a narrative account that highlights the interplay of biology, cognition, emotion and social context.
与实验不同，案例研究具有纵向性和个体性，关注于某一案例中影响因素的独特组合，而非寻求普遍规律。研究者常常深度沉浸于参与者的世界，产出一种叙事性的记录，突出生物、认知、情感与社会环境之间的交互作用。
A further feature is the potential for subjectivity: the researcher’s own interpretation plays a central role. This requires careful reflexivity and transparency in reporting, to enable readers to evaluate the trustworthiness of the account.
另一个特征是主观性的可能：研究者自身的解读起着核心作用。这要求在报告中做到谨慎的反思与透明，使读者能够评估叙述的可信度。
3. Planning a Case Study | 规划案例研究
The planning phase is critical. The researcher must first identify a clear, focused research question. For example, ‘How does severe childhood deprivation affect language acquisition?’ This helps determine the type of case and data needed.
规划阶段至关重要。研究者必须首先确定一个清晰、聚焦的研究问题。例如，“严重的童年剥夺如何影响语言习得？”这有助于确定所需案例与数据的类型。
Selecting an appropriate case is equally important. It could be a typical case, an extreme case, a deviant case or a critical case that tests a specific theory. Access, ethical clearance and the willingness of the participant (or guardian) to engage in prolonged study must be secured early.
选择恰当的案例同样重要。它可以是一个典型案例、极端案例、反常案例或用于检验某一具体理论的关键案例。取得接触许可、伦理审批以及参与者（或监护人）参与长期研究的意愿，必须尽早落实。
A detailed protocol outlining the schedule of data collection, interview guides and observation frameworks should be drafted. This ensures consistency while remaining flexible enough to respond to unexpected developments in the participant’s life.
应起草一份详细方案，列出数据收集时间表、访谈提纲及观察框架。这既能保证一致性，又保留足够的灵活性以应对参与者生活中出现的意外情况。
4. Data Collection Methods in Case Studies | 案例研究中的数据收集方法
Semi-structured interviews form the backbone of many case studies. The researcher prepares a set of open-ended questions but encourages the participant to elaborate freely, revealing themes that may not have been anticipated.
半结构化访谈是许多案例研究的支柱。研究者准备一组开放式问题，但鼓励参与者自由发挥，揭示可能未预料到的主题。
Naturalistic observations are also employed, where the researcher records behaviour in real-life settings — such as at home, school or during therapy. These observations are typically recorded as field notes and can be coded later for patterns.
此外会采用自然观察，由研究者在真实生活场景（如家中、学校或治疗期间）记录行为。这些观察通常以现场笔记形式记录，随后可进行编码以探寻模式。
Archival data such as medical records, school reports, letters and photographs can provide a historical context and allow comparisons over time. Psychometric tests, including IQ tests and personality inventories, add a quantitative dimension to the case portrait.
档案资料，如医疗记录、学校报告、信件和照片，能提供历史背景並实现跨时段的比较。心理测量工具，包括智商测试和人格量表，为案例画像增添了定量维度。
5. Ethical Considerations | 伦理考量
Ethical practice is paramount when working with a single, identifiable participant. Informed consent must be obtained, and when the participant is a child or lacks capacity, consent from a legal guardian plus assent from the individual are required.
当研究涉及单个可识别的参与者时，伦理实践至关重要。必须取得知情同意，若参与者为儿童或缺乏能力，则需获得法定监护人的同意以及本人的应允。
Confidentiality is often maintained through the use of pseudonyms (e.g., ‘HM’, ‘Genie’). However, full anonymity is sometimes impossible because the unique details of the case make it recognisable. Researchers must carefully weigh the risks of exposing the participant to public scrutiny.
通常会通过使用化名（如“HM”、“吉妮”）来维护保密性。但由于案例的独特细节使其易于辨认，完全匿名有时是不可能的。研究者须审慎权衡将参与者暴露于公众审视的风险。
The right to withdraw is complex because the participant may rely on the relationship with the researcher. Regular check-ins should be scheduled to reaffirm ongoing consent. Moreover, researchers must minimise psychological harm and arrange support services should distress arise.
退出研究的权利较为复杂，因为参与者可能依赖与研究者的关系。应安排定期回访以重申持续同意的意愿。此外，研究者须尽量减少心理伤害，并在出现困扰时提供支持服务。
6. Classic Case Study: Little Hans (Freud) | 经典案例：小汉斯（弗洛伊德）
Freud’s (1909) case study of a five-year-old boy, ‘Little Hans’, is a landmark in psychoanalytic psychology. Hans developed a phobia of horses, which Freud interpreted as a manifestation of the Oedipus complex — the boy’s unconscious desire for his mother and rivalry with his father, displaced onto a fear of being bitten by a horse.
弗洛伊德（1909）对五岁男孩“小汉斯”的案例研究是精神分析心理学的里程碑。汉斯发展出对马的恐惧，弗洛伊德将其解释为俄狄浦斯情结的表现——男孩对母亲的无意识欲望及与父亲的竞争，被移置为对被马咬伤的恐惧。
Data were gathered primarily through letters and reports from Hans’s father, a follower of Freud, who conducted the conversations and observations. Freud himself met the boy only once. This indirect method has been criticised for introducing substantial bias, as the father interpreted Hans’s statements through a Freudian lens.
数据主要通过汉斯父亲（弗洛伊德的追随者）的信件和报告收集，父亲进行了对话与观察。弗洛伊德本人仅见过男孩一次。这种间接方法被批评为引入了显著偏差，因为父亲透过精神分析的镜片来解释汉斯的言谈。
The case study yielded rich idiographic data about childhood anxiety, yet it lacks generalisability and relies heavily on a single theoretical perspective. Nevertheless, it remains an influential illustration of how case studies can generate detailed developmental hypotheses.
该案例研究产生了关于儿童焦虑的丰富个体化数据，却缺乏可推广性，且严重依赖单一理论视角。然而，它仍是一份有影响力的范例，展示了案例研究如何生成详尽的发展假设。
7. Classic Case Study: Phineas Gage | 经典案例：菲尼亚斯·盖奇
In 1848, Phineas Gage, a railroad foreman, survived an accident in which a tamping iron shot through his frontal lobes. Damasio and colleagues (1994) later reconstructed the injury using modern neuroimaging alongside historical records, concluding that damage to the ventromedial prefrontal cortex was responsible for profound personality changes.
1848年，铁路工头菲尼亚斯·盖奇在一次事故中幸存，一根夯铁棍击穿了他的额叶。达马西奥及其同事（1994）后来利用现代神经影像和历史记录重建了损伤，得出结论：腹内侧前额叶皮层的损伤导致了深刻的人格改变。
Before the accident, Gage was described as responsible, capable and temperate. Afterward, he became impulsive, profane and unable to plan for the future. This single case provided compelling evidence that specific brain regions regulate social behaviour, impulse control and emotional regulation.
事故之前，盖奇被描述为负责、能干且脾气温和。之后，他变得冲动、满口污言秽语，无法规划未来。这一孤案提供了强有力的证据，表明特定脑区负责调节社会行为、冲动控制和情绪管理。
The case of Phineas Gage is a classic example of a serendipitous case study — one that occurred naturally and could not be replicated experimentally. It illustrates how a single, well-documented case can revolutionise our understanding of brain-behaviour relationships.
菲尼亚斯·盖奇的案例是偶然案例研究的经典范例——自然发生且无法通过实验复制。它说明一个记录良好的单独案例，如何彻底改变我们对大脑与行为关系的理解。
8. Classic Case Study: Genie (Curtiss) | 经典案例：吉妮（柯蒂斯）
Genie, a pseudonym given to a girl discovered in 1970 at the age of 13, had been isolated and abused since infancy. Her case allowed psychologists to investigate the critical period hypothesis for language acquisition and the effects of extreme deprivation on development.
吉妮是一个化名，指代一名1970年发现的13岁女孩，她自婴儿期起便遭受隔离与虐待。她的案例使心理学家得以研究语言习得的关键期假设，以及极端剥夺对发展的影响。
Curtiss (1977) conducted extensive assessments including language tests, observations and cognitive tasks. Genie learned to communicate using non-verbal gestures and acquired some vocabulary, but she never mastered grammar, supporting the notion of a biologically determined critical period for syntax development.
柯蒂斯（1977）进行了广泛评估，包括语言测试、观察与认知任务。吉妮学会了用非言语手势交流并掌握了一些词汇，但始终无法掌握语法，这支持了句法发展存在生物学决定关键期的观点。
Ethical concerns arose because the research team also functioned as caregivers, blurring professional boundaries. Additionally, competing interests among researchers led to conflicts that ultimately harmed Genie’s placement and well-being, highlighting the need to prioritise participant welfare above scientific gain.
伦理担忧随之而来，因为研究团队同时充当照料者，模糊了职业界限。此外，研究者之间的利益冲突导致纷争，最终损害了吉妮的安置与福祉，这凸显出将参与者福祉置于科学收获之上的必要性。
9. Classic Case Study: HM (Molaison) | 经典案例：HM（莫莱森）
Henry Molaison, known as HM, underwent surgery in 1953 to relieve severe epilepsy, which removed large parts of his medial temporal lobes, including the hippocampus. Subsequently, HM developed profound anterograde amnesia — he could no longer form new long-term explicit memories — yet his procedural memory remained largely intact.
亨利·莫莱森，化名HM，于1953年接受手术以缓解严重癫痫，切除了包括海马体在内的大部分内侧颞叶。此后，HM患上了严重的前向性遗忘症——无法形成新的长时间外显记忆——但他的程序性记忆基本保持完整。
The case study, conducted primarily by Milner and Scoville, involved a battery of tasks including mirror drawing and star-tracing. HM improved on such tasks without any conscious recollection of having practised them, providing robust evidence for the distinction between declarative (explicit) and non-declarative (implicit) memory systems.
该案例研究主要由米尔纳和斯科维尔进行，包括镜像绘画和星形描摹等成套任务。HM在这些任务上不断进步，却没有对练习的清醒记忆，为陈述性（外显）与非陈述性（内隐）记忆系统的区分提供了有力证据。
HM’s identity was protected for decades, and the study adhered to ethical principles of the time. The richness of the data obtained from this single case profoundly shaped cognitive neuroscience and remains one of the most cited case studies in psychology.
HM的身份被保密长达数十年，研究遵循了当时的伦理原则。从该孤案中获得的丰富数据深刻地塑造了认知神经科学，至今仍是心理学中引用率最高的案例研究之一。
10. Analysing and Interpreting Case Study Data | 分析与解读案例数据
Thematic analysis is a commonly used method for analysing qualitative case study data. The researcher reads and re-reads transcripts, field notes and documents to identify recurrent themes, concepts and patterns. These themes are then organised into a coherent framework that tells the story of the case.
主题分析是分析定性案例研究数据的一种常用方法。研究者反复阅读转录稿、现场笔记与文件，识别反复出现的主题、概念与模式。然后将这些主题组织成一个连贯的框架，讲述案例的故事。
Content analysis may also be employed, where verbal or behavioural data are coded into categories. For example, in the Little Hans study, statements expressing fear could be coded and counted to trace changes over time. Quantitative elements help triangulate qualitative narratives.
也可能采用内容分析，将言语或行为数据编码为类别。例如，在小汉斯研究中，表达恐惧的陈述可以被编码并计数，以追踪随时间的变化。量化元素有助于三角验证定性叙述。
Interpretation must remain grounded in the data, though psychological theory is used to explain observed patterns. Researchers must acknowledge alternative explanations and the influence of their own perspective. Member checking — asking the participant to review interpretations — can enhance credibility.
解读必须扎根于数据，尽管会用心理学理论来解释观察到的模式。研究者须承认替代解释及其自身视角的影响。会员检验——即请参与者审查解读——可提升可信度。
11. Evaluating Case Studies: Strengths and Weaknesses | 评估案例研究：优点与局限
| Aspect (English) | Strengths | Weaknesses |
|---|---|---|
| Richness of data | Produces deep, holistic understanding; captures the complexity of real life. | Data can be overwhelming and difficult to analyse systematically. |
| Ethical feasibility | Allows investigation of phenomena that cannot be induced experimentally (e.g., deprivation, brain damage). | Risks participant identification and potential harm; blurred boundaries with dual roles. |
| Theory development | Generates new hypotheses and can challenge existing theories (e.g., HM and memory systems). | Findings may reflect researcher bias; subjective interpretation threatens objectivity. |
| Generalisability | Provides valuable idiographic knowledge for specific clinical or educational contexts. | Low external validity; findings cannot be generalised to the wider population with confidence. |
| 方面（中文） | 优点 | 局限 |
|---|---|---|
| 数据丰富性 | 产生深入的、整体性的理解；捕捉真实生活的复杂性。 | 数据可能过于庞杂且难以系统分析。 |
| 伦理可行性 | 能研究实验无法引发的现象（如剥夺、脑损伤）。 | 存在参与者身份泄露与潜在伤害的风险；双重角色导致界限模糊。 |
| 理论发展 | 产生新假设并可能挑战现有理论（如HM与记忆系统）。 | 发现可能反映研究者偏差；主观解读威胁客观性。 |
| 可推广性 | 为特定临床或教育情境提供有价值的个体化知识。 | 外部效度低；无法自信地将结果推广至更广人群。 |
While all methods have tradeoffs, the case study’s unique power lies in its ability to chronicle the unfiltered texture of a lived experience, often becoming the starting point for more controlled investigations.
尽管所有方法都存在取舍，但案例研究的独特力量在于它能够记录下真实生活未经过滤的质地，常常成为更具控制性的研究之起点。
12. Exam Skills: Applying Case Studies | 考试技巧：应用案例研究
In the AS Eduqas examination, you may be asked to describe a case study in your own words, identify the method’s strengths and weaknesses, or evaluate a given scenario using your knowledge of case study principles. Always anchor your answers in specific, named examples.
在AS Eduqas考试中，你可能会被要求用自己的话描述一个案例研究，指出该方法的优点与局限，或运用你对案例研究原则的知识来评估一个给定场景。始终以具体的、有名称的例子为答案之锚。
When evaluating, use the SEAF structure: Strengths, Ethical issues, Alternative evidence and Further considerations (e.g., reliability, validity, subjectivity). For instance, when discussing HM, you can highlight the high ecological validity and the impossibility of experimental replication, and balance it with issues of generalisability and consent.
评估时，使用SEAF结构：优点（Strengths）、伦理问题（Ethical issues）、替代证据（Alternative evidence）和进一步考量（Further considerations，如信度、效度、主观性）。例如，在讨论HM时，可强调其高生态效度和实验复制的不可行性，同时平衡可推广性和同意问题。
Command words such as ‘compare’ demand direct contrasts between two case studies. A tabular plan can help. Also, always state a justified conclusion — the psychologist’s exam answer shouldn’t just list points but show a clear line of reasoning that leads to a verdict.
像“比较”这样的指令词要求对两个案例研究直接进行对比。表格规划会有所帮助。此外，始终给出一个经论证的结论——心理学家的考试答案不应只是罗列要点，而要展现一条清晰的推理脉络并最终得出判断。
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