T he features of a case study: Revision Notes

A case study is an in-depth investigation focused on a single individual, group, or event. Unlike broad surveys or experiments involving many participants, case studies aim to explore complex psychological phenomena in detail within their real-life context. This approach allows psychologists to gather rich qualitative and quantitative data that might be missed by other research methods.

For example, a psychologist might conduct a case study on a person who has experienced a rare psychological disorder to understand the condition’s effects on behaviour and cognition over time. This detailed insight can contribute to theory development or clinical practice.

• Focus on one individual, group, or event.
• Provides detailed, holistic understanding.
• Useful for exploring rare or complex phenomena.

Case studies gather information using a variety of methods to build a comprehensive picture of the subject. Common methods include:

Tests: Standardised psychological tests can measure intelligence, memory, personality traits, or other cognitive functions.

Tasks: Specific activities designed to observe behaviour or problem-solving skills in controlled settings, such as memory recall tasks or reaction time tests, provide objective data points about the subject’s abilities or responses under certain conditions.

• Tests assess cognitive or psychological traits.
• Tasks observe behaviour in controlled scenarios.
• Observations record natural behaviour in real-life settings.
• Questionnaires collect self-reported data on thoughts, feelings, or behaviours.
• Interviews provide detailed personal accounts and explanations.

Observations involve watching and recording behaviour either in natural environments or structured settings. This method helps capture spontaneous actions and interactions that tests or tasks might not reveal.

Questionnaires allow the subject to report on their own experiences, attitudes, or symptoms, often using standardised scales to quantify responses.

Interviews, whether structured or unstructured, enable the researcher to explore the subject’s perspective in depth, clarifying answers and probing for additional information. For example, a clinical interview might explore the history and impact of a psychological condition on daily life.

• Observations capture real-time behaviour.
• Questionnaires provide subjective self-reports.
• Interviews allow detailed exploration of experiences.

Triangulation refers to the use of multiple data collection methods within a single case study to cross-verify findings. By comparing information from tests, observations, questionnaires, and interviews, researchers can identify consistencies and discrepancies, increasing confidence in the results.

For instance, if a subject reports high anxiety levels in a questionnaire, and this is supported by observed nervous behaviours and physiological test results, the triangulated data strengthens the validity of the conclusion.

Triangulation reduces the risk of bias or error that might arise from relying on a single method, making the case study’s findings more robust and credible.

• Combines multiple methods to verify data.
• Increases validity and reliability.
• Helps identify inconsistencies or biases.

Case studies provide rich, detailed data that can reveal insights into psychological processes, especially for rare or complex cases where large samples are impractical.

However, they require careful planning to select appropriate methods and ensure ethical standards, such as informed consent and confidentiality, are maintained.

Researchers must also be aware of limitations like potential researcher bias and limited generalisability due to the focus on a single case. Using triangulation and transparent reporting helps mitigate these issues.

• Provides comprehensive, detailed information.
• Useful for unique or rare cases.
• Requires ethical considerations and careful method selection.
• Limitations include potential bias and limited generalisability.

A case study is a detailed, in-depth investigation of a single individual, group, or event. It collects rich qualitative and sometimes quantitative data through various methods such as interviews, observations, tests, and questionnaires. The goal is to gain comprehensive understanding of complex psychological phenomena that might not be captured by broader studies.

For example, a case study might explore the memory abilities of a person with brain damage to understand how memory works in the brain.

• Focuses on one case or a small number of cases.
• Uses multiple data collection methods (triangulation).
• Provides detailed, contextual information.

Psychological theories and concepts are often illustrated through case studies. Applying knowledge from these studies to new situations helps students and psychologists evaluate how well theories explain behaviour beyond the original case.

For instance, if a case study shows that a specific therapy helped one individual with anxiety, applying this knowledge involves considering whether the therapy might help others with similar symptoms, or under what conditions it might be effective.

This skill is essential for exam questions that ask you to suggest or explain how case study findings relate to new examples.

• Supports critical thinking and evaluation.
• Helps generalise or adapt findings cautiously.
• Enables explanation of psychological phenomena in unfamiliar contexts.

1. Identify the key features or findings of the original case study relevant to the new situation.

2. Analyse the new example carefully, noting similarities and differences with the original case.

3. Explain how the case study findings might help understand or predict behaviour in the new example, using psychological concepts and reasoning to justify your points.

• Extract relevant findings from the case study.
• Compare and contrast with the new scenario.
• Use psychological theory to support your explanation.

Consider the famous case study of Phineas Gage, who suffered brain damage affecting his personality. Applying this knowledge to a new case of brain injury involves recognising that damage to certain brain areas can alter behaviour and personality.

If asked to explain behaviour changes in a new patient with frontal lobe damage, you could justify your answer by referring to Gage’s case, showing how brain injury can impact decision-making and social behaviour.

This demonstrates how case study knowledge informs understanding of new but related situations.

• Use original case findings as a basis.
• Relate to new case features.
• Explain with psychological reasoning.

Case studies often focus on unique or rare cases, so their findings may not be generalisable to all individuals. When applying knowledge, it is important to consider differences in context, individual characteristics, and other variables.

For example, a therapy effective in one case might not work for everyone due to personal differences or environmental factors.

Acknowledging these limitations strengthens your exam answers by showing critical evaluation.

• Limited generalisability due to unique cases.
• Potential bias or lack of control variables.
• Need for cautious interpretation when applying findings.