📚 Case Study Practical Exercises | 案例分析实战演练
In CCEA Year 10 Psychology, case studies are one of the most powerful research methods for exploring human behaviour in depth. A case study involves the detailed investigation of a single individual, group, or event, often using multiple data sources such as interviews, observations, and psychological tests. This article provides you with a step-by-step guide to approaching case study exercises, with worked examples and typical exam-style questions.
在 CCEA 十年级心理学课程中，案例分析是深入探究人类行为最有力的研究方法之一。案例研究是指对单个个体、群体或事件进行深入调查，通常综合使用访谈、观察、心理测试等多种数据来源。本文为你提供逐步处理案例研究习题的指南，附上实例解析和典型考题演练。
1. What is a Case Study? | 什么是案例研究？
A case study is an in-depth, longitudinal examination of a single person or small group. Unlike surveys or experiments, it does not aim for generalisability but rather seeks to uncover rich, detailed insight into unusual or unique behaviours. Famous examples include the case of Phineas Gage, whose personality changed after a brain injury, and the study of Genie, a girl who experienced extreme isolation.
案例研究是对单个人或小群体进行的深入、纵向调查。与问卷调查或实验不同，它的目的不是追求普遍性，而是试图揭示对不寻常或独特行为的丰富、细致的洞察。著名的例子包括菲尼亚斯·盖奇（大脑损伤后性格改变）和对吉妮（经历过极度与世隔绝的女孩）的研究。
2. Why Use Case Studies in Psychology? | 为什么在心理学中使用案例研究？
Psychologists use case studies when it is ethically or practically impossible to create experimental conditions. They are particularly useful in clinical psychology and neuropsychology to document rare disorders or the effects of trauma. The method generates hypotheses for future research and gives a voice to individuals whose experiences might otherwise be overlooked.
心理学家在伦理上或实际操作中不适宜制造实验条件时，会使用案例研究。它们在临床心理学和神经心理学中尤其有用，可以用来记录罕见障碍或创伤的影响。这种方法能为未来研究提供假设，并赋予那些可能被忽略的个体发声的机会。
3. Key Features of a Good Case Study | 优秀案例研究的关键特征
A strong case study uses triangulation – collecting data from multiple sources such as interviews, diaries, school reports, and psychometric tests. It should be longitudinal, tracking changes over time, and rich in qualitative detail. The researcher must also strive for reflexivity, acknowledging their own biases and influence on the data collection process.
一项强有力的案例研究会运用三角验证法——从访谈、日记、学校报告和心理测量测试等多种渠道收集数据。它应当是纵向的，追踪随时间发生的变化，并包含丰富的定性细节。研究者还必须力求反思性，坦诚面对自身的偏见以及对数据收集过程的影响。
4. How to Analyse a Case Study Exercise | 如何分析案例研究题目
When given a case study in an exam, start by identifying the research method used (e.g. observations, interviews). Note the type of data collected – qualitative, quantitative, or both. Then, consider the aim of the study and any ethical issues present. Finally, link the findings to relevant psychological theories, and evaluate the strengths and limitations of using a case study approach for this context.
在考试中拿到案例研究题时，首先要识别所使用的研究方法（如观察法、访谈法）。注意收集的数据类型——定性、定量或二者兼有。然后，思考研究的目的以及存在的伦理问题。最后，将发现与相关的心理学理论联系起来，并评价在这种情境下使用案例研究方法的优点和局限性。
5. Worked Example 1: The Boy Who Couldn't Stop Eating | 案例实例一：无法停止进食的男孩
Read the following scenario: 'Josh, a 14-year-old, suffers from Prader-Willi syndrome, a genetic condition causing constant hunger. A psychologist studies Josh over three years using interviews with his family, school observations, and food diaries. Findings show that structured meal plans and psychological support reduce his anxiety around food.' Now, identify the research method, type of data, and one strength and one weakness of this study.
阅读以下情境：“十四岁的乔希患有普拉德-威利综合征，这种遗传病会导致持续的饥饿感。一位心理学家对乔希进行了为期三年的研究，采用与家人访谈、学校观察和食物日记等方式。结果显示，结构化的饮食计划和心理支持减轻了他对食物的焦虑。” 现在，请确定研究方法、数据类型以及本研究的一个优点和一个缺点。
6. Answer for Worked Example 1 | 案例实例一参考答案
The research method is a case study using multiple data collection techniques: interviews, observations, and food diaries. The data is both qualitative (descriptions of emotions) and quantitative (records of food intake). A strength is that it provides rich, detailed insight into how the syndrome affects daily life. A weakness is that findings from a single case cannot be generalised to other individuals with Prader-Willi syndrome.
研究方法是案例研究，运用了多种数据收集技术：访谈、观察和食物日记。数据既有定性（对情绪的描写），也有定量（食物摄入记录）。优点在于它为理解该综合征如何影响日常生活提供了丰富、细致的见解。缺点是单个案例的发现无法推广到其他患有普拉德-威利综合征的个体。
7. Worked Example 2: The Amnesic Musician | 案例实例二：失忆的音乐家
Scenario: 'Amy, aged 32, suffers severe memory loss after a viral infection but can still play complex piano pieces from memory. A psychologist conducts in-depth interviews, cognitive tests, and brain scans over six months. The study suggests that musical memory is stored in brain areas separate from those for autobiographical memory.' Evaluate the reliability of this case study.
情境：“三十二岁的艾米在一次病毒感染后严重失忆，但仍能凭记忆演奏复杂的钢琴曲。一位心理学家在六个月内进行了深入访谈、认知测试和脑部扫描。研究表明，音乐记忆存储在与自传体记忆不同的大脑区域。” 评价该案例研究的可靠性。
8. Answer for Worked Example 2 | 案例实例二参考答案
Reliability in case studies is often low because the findings are not easy to replicate. Another researcher studying a different amnesic musician might obtain different results. However, the use of brain scans and standardised cognitive tests adds a layer of scientific rigour. The longitudinal nature helps ensure consistency in the findings over time, but the unique nature of Amy's condition still limits external reliability.
案例研究的可靠性通常较低，因为研究结果不易重复。另一位研究者对不同的失忆音乐家进行研究可能会得出不同的结果。然而，脑部扫描和标准化的认知测试增加了一层科学严谨性。纵向研究的性质有助于保证研究结果随时间推移的一致性，但艾米病情的独特性仍然限制了外部可靠性。
9. Common Exam Questions on Case Studies | 案例研究常见考题类型
Typical CCEA exam questions require you to: 'Identify two features of a case study', 'Explain one strength of using a case study in clinical psychology', 'Suggest how the researcher could improve the validity of this case study', or 'Using the scenario, discuss the ethical considerations involved'. Practise linking each question to the specific details in the stimulus material.
CCEA 典型的考题要求你：“识别案例研究的两个特征”、“解释在临床心理学中使用案例研究的一个优点”、“建议研究者如何提高该案例研究的效度”，或者“结合情境，讨论涉及的伦理考量”。练习将每个问题与刺激材料中的具体细节联系起来。
10. Ethical Considerations in Case Studies | 案例研究中的伦理考量
Case studies often deal with sensitive personal information, making confidentiality and anonymity paramount. The researcher must obtain informed consent from the participant or a guardian, and give the right to withdraw data at any stage. There is also a risk of the participant becoming dependent on the researcher in longitudinal designs, so clear professional boundaries must be maintained.
案例研究经常涉及敏感的个人信息，因此保密和匿名至关重要。研究者必须征得参与者或监护人的知情同意，并允许其在任何阶段撤回数据。在纵向设计中还有参与者对研究者产生依赖的风险，因此必须保持清晰的专业界限。
11. Strengths and Limitations Table | 优点与局限速查表
The table below summarises the key strengths and limitations of the case study method, which you should be able to recall and apply in exam questions.
下表总结了案例研究方法的主要优点和局限，你应当能够记忆并运用于考试题目。
| Strengths / 优点 | Limitations / 局限 |
|---|---|
| Provides rich, detailed data (high ecological validity) / 提供丰富、详细的数据（高生态效度） | Findings cannot be generalised / 研究结果无法推广 |
| Allows investigation of rare or unique cases / 允许调查罕见或独特的案例 | Researcher bias may influence interpretation / 研究者偏见可能影响解释 |
| Generates hypotheses for future research / 为未来研究提供假设 | Low reliability – difficult to replicate / 可靠性低——难以重复 |
12. Top Tips for the CCEA Exam | CCEA 考试顶级贴士
Always read the provided case study at least twice before answering. Underline key points relating to method, data, and ethics. When evaluating, use the PEEL structure: Point, Evidence, Explanation, Link back to the question. Finally, remember that case studies are not simply 'bad experiments' – they have their own unique purpose in psychology, and the examiner wants to see that you appreciate both their value and their limitations.
在作答前，务必将提供的案例研究材料至少读两遍。划出与方法、数据和伦理相关的关键点。评价时，使用 PEEL 结构：观点、证据、解释、回扣问题。最后，记住案例研究并不是“不好的实验”——它们在心理学中有着自己独特的目的，考官希望看到你既认可它们的价值，也明白它们的局限性。
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