Research approaches: case studies, surveys, ethnography, longitudinal and mixed methods

Introduction to Research Approaches

In Sociology, if research methods (like questionnaires or interviews) are the tools in a toolbox, then research approaches are the overall plans for how to use those tools. Depending on what a sociologist wants to find out, they might choose a "big picture" approach or a "deep dive" approach.

In this chapter, we will look at five main strategies: social surveys, case studies, ethnography, longitudinal studies, and mixed methods. Understanding these will help you evaluate which approach is best for different sociological questions.

1. Social Surveys

A social survey is a large-scale research approach used to collect information from a wide range of people. It is usually designed to be representative, meaning the people studied (the sample) reflect the characteristics of the larger population.

Key Features:

• Quantitative Focus: Surveys usually collect numbers and statistics.
• Standardised: Every participant is typically asked the same questions in the same way (often using questionnaires or structured interviews).
• Broad Reach: They can cover thousands of people across a whole country.

Strengths:

Generalisability: Because the sample is large, researchers can make claims about society as a whole.
Reliability: Since the questions are standardised, the research is easy to repeat to see if the results stay the same.

Limitations:

Lack of Depth: Surveys often tell us what is happening, but they struggle to explain why because the answers are limited to pre-set options.
Low Validity: People might not tell the truth, or they might misunderstand a question, meaning the data doesn't reflect their real life perfectly.

2. Case Studies

A case study is an in-depth, detailed investigation of a single "case." This "case" could be one person, one specific school, one business, or even one single event.

Key Features:

• Qualitative Detail: Case studies use a variety of methods (interviews, observations, documents) to get a "thick description" of the subject.
• Micro-level: It focuses on the small scale rather than the whole of society.

Strengths:

High Validity: Researchers get to know the subject so well that they can uncover deep truths and meanings.
Generating Hypotheses: A case study can uncover a new trend that sociologists can then test on a larger scale later.

Limitations:

Not Representative: You cannot assume that what happens in one specific school or group happens everywhere else.
Researcher Bias: The researcher may become too involved with the subject, losing their objectivity.

3. Ethnography

Ethnography is about studying a group’s entire way of life by becoming part of it. It is closely linked to interpretivism and the concept of verstehen (understanding the world through the eyes of the people you are studying).

Key Features:

• Immersion: The researcher lives with or spends significant time with the group.
• Naturalistic: It studies people in their own environment, rather than in a lab.
• Method: Usually involves participant observation and unstructured interviews.

Strengths:

Authenticity: It shows how people actually behave in real life, rather than how they say they behave in a survey.
Deep Insight: It is the best way to understand the meanings and values behind human behaviour.

Limitations:

Time and Money: Ethnography can take months or even years to complete.
Hard to Replicate: Because every group and researcher is unique, it is very difficult to repeat the study to check for reliability.

4. Longitudinal Studies

Most research is a "snapshot" of one moment in time. A longitudinal study is more like a "movie"—it follows the same group of people over a long period (years or even decades).

Key Features:

• Tracking Change: It allows sociologists to see how people’s lives, attitudes, and identities change as they get older.
• Comparison: You can compare the same people at age 5, 15, and 25.

Strengths:

Identifying Trends: It is excellent for seeing long-term effects, such as how childhood poverty affects adult health.
High Validity: It provides a very detailed account of a life story over time.

Limitations:

Attrition: This is the biggest problem. People may drop out of the study, move away, or pass away, which can make the remaining group unrepresentative.
The "Hawthorne Effect": Being studied for decades might cause participants to change their behaviour because they know they are being watched.

5. Mixed Methods

Sometimes, one approach isn't enough. Many modern sociologists use mixed methods, which means combining different research methods or approaches in a single study.

Two Important Concepts:

1. Methodological Pluralism: Using several different methods (e.g., a survey and an interview) to build a fuller, more complete picture of social life.
2. Triangulation: This is a specific type of mixed-methods approach where you use one method to check the accuracy of another. For example, if your survey says students are happy, you might use observations to see if their behaviour matches their survey answers.

Strengths:

Best of Both Worlds: You get the reliability and generalisability of quantitative data (numbers) combined with the validity and depth of qualitative data (words).
Increased Confidence: If two different methods show the same result, the researcher can be more certain that their findings are correct.

Limitations:

Complexity: It requires the researcher to be skilled in many different types of research.
Conflicting Results: Sometimes, a survey might say one thing and an interview might say another, leaving the researcher to decide which one to trust!

Quick Review Table

Key Takeaways for the Exam

• Positivists generally prefer Social Surveys because they like objective, reliable, and quantitative data.
• Interpretivists generally prefer Ethnography and Case Studies because they value validity and subjectivity.
• If an exam question asks you to evaluate a method, always think about its Practical (time/money), Ethical (consent/harm), and Theoretical (validity/reliability/representativeness) pros and cons.