📚 IGCSE CCEA Psychology: Case Study Practical Exercises | IGCSE CCEA 心理学：案例分析实战演练
In IGCSE Psychology, the case study is one of the most powerful research methods used to investigate behaviour and mental processes in depth. It provides rich, detailed data about a single individual, group or event, often revealing insights that other methods might miss. This article will guide you through the essentials of case study analysis, offering practical exercises to sharpen your evaluation skills and prepare you for CCEA examination questions.
在 IGCSE 心理学中，个案研究是深入探究行为和心理过程的最有力研究方法之一。它提供关于某个个体、群体或事件的丰富而详细的数据，往往揭示出其他方法可能遗漏的洞察。本文将通过实战演练引导你掌握个案分析的核心要素，磨炼你的评估技巧，为应对 CCEA 考试题目做好准备。
1. What Is a Case Study? | 什么是个案研究？
A case study is an in-depth investigation of a single person, group or event. Psychologists gather data using multiple techniques such as interviews, observations, questionnaires and psychological tests. The aim is to build a comprehensive picture of the subject's behaviour and mental life, often over a long period of time. Unlike experiments, case studies do not manipulate variables; they describe and interpret what is naturally occurring.
个案研究是对单一个人、群体或事件的深入调查。心理学家通过访谈、观察、问卷和心理测验等多种技术收集数据，目的是建立关于研究对象的行为与心理生活的全面图景，通常跨越较长时间。和实验不同，个案研究不操纵变量，而是描述并解释自然发生的现象。
In CCEA IGCSE Psychology, you will encounter famous case studies such as Phineas Gage, Little Albert and Patient H.M. These are not just stories — they are carefully documented examples that illustrate key psychological theories and ethical issues.
在 CCEA IGCSE 心理学中，你会遇到像菲尼斯·盖奇、小阿尔伯特和病人 H.M. 这样的著名案例。这些不仅仅是故事，它们是经过仔细记录的例证，说明了关键心理学理论和伦理议题。
2. Types of Case Study Data | 个案研究数据的类型
Case studies generate primarily qualitative data — rich, descriptive information such as personal accounts, feelings and detailed observations. However, they can also include quantitative data, for example, scores on memory tests or reaction times. The combination of both types of data, known as triangulation, strengthens the validity of the findings.
个案研究主要产生质性数据——丰富的描述性信息，如个人叙述、感受和细致观察。不过它们也可以包含量化数据，例如记忆测验得分或反应时间。两种数据的结合使用被称为三角互证，能增强研究发现的有效性。
When analysing a case study for your exam, always identify whether the evidence is qualitative, quantitative or mixed methods. This demonstrates your grasp of research methodology, a skill highly valued in CCEA assessments.
在考试中分析个案时，一定要鉴别证据属于质性、量化还是混合方法。这展示了你对研究方法的掌握，是 CCEA 评估中非常看重的一项技能。
3. The Step-by-Step Process of Case Analysis | 个案分析的逐步流程
Approaching a case study systematically improves your answers. Use the following framework: 1) Identify the aim and context; 2) Describe the participant(s) and procedure; 3) Summarise the main findings; 4) Evaluate the strengths and limitations; 5) Discuss ethical considerations; 6) Link findings to psychological theories or concepts.
按系统方法处理个案研究会提高你的作答质量。使用以下框架：1) 明确目的和背景；2) 描述参与者及程序；3) 总结主要发现；4) 评价优势与局限；5) 讨论伦理考量；6) 将发现与心理学理论或概念联系起来。
Practise this framework on every example you meet. The more you rehearse, the more natural it becomes to spot both the explicit and implicit details that examiners look for.
在你遇到的每个例子上练习这个框架。练习越多，你就越能自然而然地发现考官所求的那些显性和隐性细节。
4. Real-World Classic: Phineas Gage | 真实经典案例：菲尼斯·盖奇
In 1848, a railway construction foreman named Phineas Gage suffered a catastrophic accident when an iron rod was driven through his skull, damaging his frontal lobes. Miraculously, he survived, but his personality changed dramatically — from a responsible, sociable man to someone impulsive and profane. This case provided early evidence that the frontal lobes are involved in regulating personality and social behaviour.
1848 年，铁路建设工头菲尼斯·盖奇遭遇了一场灾难性事故：一根铁棍穿透了他的颅骨，损伤了额叶。他奇迹般活了下来，但性格发生剧变——由负责任、善于交际变成冲动、满口脏话的人。这个案例提供了早期证据，表明额叶参与调节人格和社交行为。
When practising, ask yourself: What type of data did the doctors collect? (Observations, medical records, interviews with acquaintances.) Was it ethical? (No formal ethical guidelines existed then, but modern analysis would question privacy and consent.) How does it link to the biological approach? (Brain localisation of function.)
练习时问自己：医生收集了什么类型的数据？（观察、病历、熟人访谈。）这符合伦理吗？（当时没有正式伦理准则，但现代分析会质疑隐私和知情同意。）它如何与生物学取向联系？（大脑功能定位。）
5. Practice Case 1: Little Albert | 实战案例1：小阿尔伯特
Read the following summary, then attempt the analysis questions below. In 1920, John B. Watson and Rosalie Rayner conducted a study on an 11-month-old boy known as 'Little Albert'. Initially, Albert showed no fear of a white rat. The researchers then paired the rat's appearance with a loud, frightening noise (striking a steel bar). After several pairings, Albert cried and crawled away whenever the rat was presented, and his fear generalised to other fuzzy objects like a rabbit, a fur coat and a Santa Claus mask.
阅读以下摘要，然后尝试回答分析题。1920 年，约翰·B·华生和罗莎莉·雷纳对一个被称为“小阿尔伯特”的 11 个月大男婴进行研究。起初，阿尔伯特对白鼠没有恐惧。研究者随后将白鼠的出现与巨大吓人的响声（敲击钢条）配对。多次配对后，只要呈现白鼠，阿尔伯特就大哭并爬走，而且他的恐惧泛化到其他毛茸茸的物品，如兔子、皮大衣和圣诞老人面具。
What type of conditioning is illustrated here? (Classical conditioning.)
这里演示了哪种条件反射？（经典条件反射。）
Identify the unconditioned stimulus, unconditioned response, neutral stimulus, conditioned stimulus and conditioned response.
找出非条件刺激、非条件反应、中性刺激、条件刺激和条件反应。
Explain one ethical issue with this study and suggest a modern alternative approach.
解释这项研究的一个伦理问题，并提出现代替代方法。
Evaluate the reliability and validity of a single-subject case study like this.
评价这类单一被试个案研究的信度和效度。
6. Practice Case 2: Genie (The Wild Child) | 实战案例2：吉妮（野孩子）
Genie was discovered in 1970 at age 13, having been isolated and severely abused by her parents for most of her life. She was unable to speak, walked with a 'bunny-like' gait and showed no social skills. Psychologists saw her as a unique opportunity to study the critical period hypothesis of language acquisition. Despite intensive rehabilitation, Genie's language never fully developed, suggesting that the brain's optimal window for learning language had closed.
吉妮在 1970 年 13 岁时被发现，此前她大部分时间被父母隔离并严重虐待。她不会说话，走路像兔子跳，缺乏社交技能。心理学家视她为研究语言习得关键期假说的独特机会。尽管进行了强化康复，吉妮的语言从未完全发展，表明大脑学习语言的最佳窗口已经关闭。
Discussion points for practice: How does Genie's case support the biological and cognitive approaches? What data collection methods were used? (Interviews, observations, cognitive tests, audio recordings.) What ethical dilemmas arose after the research ended? (Care vs. research conflicts, privacy, informed consent from a vulnerable individual.)
供练习的讨论要点：吉妮的案例如何支持生物学和认知取向？使用了哪些数据收集方法？（访谈、观察、认知测验、录音。）研究结束后出现了哪些伦理困境？（照料与研究的冲突、隐私、弱势个体的知情同意。）
7. Practice Case 3: Patient H.M. (Henry Molaison) | 实战案例3：病人 H.M.（亨利·莫莱森）
Patient H.M. underwent brain surgery in 1953 to alleviate severe epilepsy. The surgeon removed parts of his medial temporal lobes, including the hippocampus and amygdala. After the operation, H.M. could no longer form new long-term memories — a condition called anterograde amnesia — although his short-term memory and procedural memory (e.g. learning new motor skills) remained intact. This dissociation revolutionised our understanding of separate memory systems in the brain.
病人 H.M. 于 1953 年接受脑部手术以缓解严重癫痫。外科医生切除了他内侧颞叶的部分结构，包括海马体和杏仁核。术后，H.M. 无法形成新的长时记忆——即顺行性遗忘症——尽管他的短时记忆和程序性记忆（如学习新的动作技能）仍然完好。这种分离革命性地改变了我们对大脑独立记忆系统的理解。
Apply the analysis framework: What was the aim? To treat epilepsy, then later to study memory. What were the key findings? trengthen validity, but low generalisability due to n=1. What ethical issues arise in a longitudinal case study? Ongoing consent, right to withdraw, confidentiality.
应用分析框架：目的是什么？最初为治疗癫痫，后来转为研究记忆。主要发现是什么？海马体对于巩固陈述性记忆至关重要，但对程序性记忆则并非必需。评价：深入的细节和纵向数据提高了有效性，但因 n=1 导致可推广性低。纵向个案研究会带来哪些伦理问题？持续知情同意、退出权、保密。
8. Evaluating Case Studies: Strengths | 个案研究的优势评价
One major strength of case studies is the depth of insight they provide. Researchers can investigate rare or unique phenomena that cannot be ethically or practically replicated in experiments, such as extreme isolation or brain injury. They often generate new hypotheses that can be tested later by larger-scale quantitative methods. The use of multiple data sources (interviews, observations, archival records) allows triangulation, which boosts the credibility of the conclusions.
个案研究的一个主要优势是它所提供的洞察深度。研究者可以探究在实验中无法伦理或现实地重复的罕见或独特现象，例如极端隔离或脑损伤。它们常常产生新的假设，而后可通过更大规模的量化方法进行检验。多数据源（访谈、观察、档案记录）的使用允许三角互证，增强了结论的可信度。
Furthermore, case studies highlight the complexity of human behaviour, reminding us that psychological processes cannot always be reduced to laboratory variables. For CCEA essays, you should be able to contrast these strengths with the limitations of experiments and surveys.
此外，个案研究强调了人类行为的复杂性，提醒我们心理过程并非总能简化为实验室变量。在 CCEA 论文题中，你应当能够将这些优势与实验和调查的局限进行对比。
9. Evaluating Case Studies: Limitations | 个案研究的局限评价
The most frequently cited limitation is low generalisability. Because case studies focus on a single subject or very small sample, we cannot assume that the findings apply to the wider population. There is also a high risk of researcher bias, as the investigator may become too involved with the participant, interpreting data subjectively. Additionally, case studies often rely on retrospective data (memories, past records), which may be inaccurate or incomplete.
最常被提及的局限是可推广性低。因为个案研究聚焦于单一被试或极小样本，我们不能假设其发现适用于更广泛的人群。还存在较高的研究者偏见风险，因为研究者可能与参与者关系过于紧密，从而主观解读数据。此外，个案研究常常依赖回溯数据（记忆、过往记录），这些可能不准确或不完整。
Another weakness is that establishing cause-and-effect relationships is difficult. Without controlled manipulation of the independent variable, we cannot confidently say that one factor caused another. For instance, was Genie's language deficit solely due to deprivation, or were there congenital factors? Always highlight these uncertainties in your evaluation.
另一个弱点是难以建立因果关系。在没有对自变量进行控制操纵的情况下，我们无法确信一因素导致另一因素。例如，吉妮的语言缺陷完全是由剥夺造成，还是有先天因素？在你的评价中始终要突出这些不确定性。
10. Ethical Issues in Case Study Research | 个案研究中的伦理议题
Ethical practice is especially sensitive in case studies because of the intense, personal nature of the research. Key issues include informed consent (particularly with vulnerable participants such as children or patients with brain injury), the right to withdraw, protection from psychological harm, and confidentiality. For instance, 'Little Albert' was subjected to deliberate fear induction without apparent debriefing or removal of the fear, which would violate today's ethical standards.
伦理实践在个案研究中尤为敏感，因为研究具有深入的个人特性。关键议题包括知情同意（特别是面对脆弱参与者，如儿童或脑损伤病人）、退出权、避免心理伤害以及保密。例如，“小阿尔伯特”遭受了故意恐惧诱导，没有明显的解释说明或恐惧消除，这违反了现今的伦理标准。
Modern case studies comply with strict ethical guidelines established by bodies such as the British Psychological Society (BPS). Participants' identities are usually disguised, and data is anonymised. Always consider ethics when evaluating any case study in your exam: 'What would the BPS code of ethics require?' is a powerful question to ask.
现代个案研究遵循英国心理学会等机构制定的严格伦理准则。参与者身份通常被掩藏，数据匿名化。在考试中评价任何个案研究时，务必考虑伦理：‘BPS 伦理规范会要求什么？’这是一个强有力的提问。
11. Writing a Strong Case Study Response in the Exam | 在考试中写出强有力的个案研究作答
CCEA exam questions often present an unfamiliar case study and ask you to analyse it. Structure your response clearly. Begin by stating the aim or question under investigation. Then describe the method used and identify the type of case study (e.g. longitudinal, retrospective). Next, outline the key findings. After that, dedicate a paragraph to evaluation — mention both strengths and limitations, and always link back to the question. Conclude by connecting the case to relevant psychological theories or concepts from the specification.
CCEA 考试题目常常给出一个不熟悉的个案研究，要求你进行分析。清晰组织你的答案。首先陈述调查的目的或问题。然后描述使用的方法并判断个案研究的类型（如纵向、回溯）。接着，概述关键发现。之后，专门用一个段落进行评价——提及优势与局限，并始终回扣题目。最后，将此个案与课程大纲中的相关心理学理论或概念联系起来。
Use technical vocabulary: 'triangulation', 'longitudinal', 'generalisability', 'researcher bias', 'validity', 'reliability', 'ethical considerations'. Marks are awarded for appropriate and accurate use of terminology. Balance is crucial — a good answer recognises that case studies are powerful but imperfect tools.
使用专业术语：‘三角互证’、‘纵向’、‘可推广性’、‘研究者偏见’、‘有效性’、‘信度’、‘伦理考量’。恰当而准确地使用术语能得分。平衡至关重要——好的回答承认个案研究是强大但并不完美的工具。
12. Final Practical Drill: Analyse a Mini-Case | 最后实战演练：分析一个小型案例
Imagine a psychologist studies a child with an extraordinary musical memory — able to play complex pieces after hearing them only once. Data are collected through parent interviews, music teacher observations and IQ tests over five years. Apply everything you have learned: What is the strength of this approach? (Rich developmental data.) What is a limitation? (Cannot generalise to all children; could be researcher bias.) What ethical issues must be addressed? (Child's assent, parental consent, confidentiality, avoiding labelling.) How might the findings contribute to our understanding of memory?
假设一位心理学家研究一名具有超凡音乐记忆的儿童——听过一遍复杂乐曲就能演奏。数据通过家长访谈、音乐教师观察和五年间的 IQ 测验收集。运用你学到的一切：这个方法的优点是什么？（丰富的发展数据。）局限是什么？（不能推广到所有儿童；可能存在研究者偏见。）必须处理哪些伦理问题？（儿童赞同、家长同意、保密、避免贴标签。）发现如何有助于我们对记忆的理解？
Write a brief paragraph summarising the case, then add your evaluation. This deliberate practice will train your mind to think like a psychologist, which is the ultimate goal of IGCSE Psychology.
写一段简短文字总结该个案，然后补充你的评价。这种有意的练习将训练你的思维像心理学家一样思考，这也是 IGCSE 心理学的终极目标。
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