O Level Sociology: Research Approaches and Types of Data (Cambridge 2251)

Before sociologists collect any evidence they must decide how to approach society and what kind of data to use. Key questions 1.1 and 1.2 of Cambridge O Level Sociology (2251) cover exactly this: the positivist and interpretivist approaches, ways of combining them, the concepts used to judge research, and the main types of primary and secondary data, including how to read tables and graphs in the exam. These ideas are tested in the compulsory Research methods question of Paper 1.

For research design, sampling and methods (key question 1.3), see the O Level research methods, identity and inequality guide.

Syllabus coverage

Cambridge O Level Sociology 2251, syllabus for 2025, 2026 and 2027 (Version 3):

Key question	Content
1.1 How do sociologists approach the study of society?	1.1.1 the positivist approach (scientific method, macro view, social facts, quantitative data, causation and correlation, patterns and trends, objectivity and reliability); 1.1.2 the interpretivist approach (micro view, meanings and motivations, qualitative data, in-depth, subjectivity, validity and verstehen); 1.1.3 triangulation and longitudinal studies; 1.1.4 bias, interviewer effect, Hawthorne/observer effect, validity, reliability, representativeness, generalisability
1.2 What types of data and evidence do sociologists use?	1.2.1 primary and secondary, qualitative and quantitative data and their strengths and limitations; 1.2.2 secondary evidence (official statistics, historical and personal documents, digital sources, media content); 1.2.3 analysing summaries of studies, diagrams, tables, charts and graphs

The 2251 syllabus content is the same as Cambridge IGCSE Sociology 0495, so these concepts are identical; the examples on this page are chosen for O Level learners.

What is the positivist approach?

Positivists believe sociology should copy the natural sciences. They take a macro view of society as a structure of social facts — such as the class system or religious institutions — that exist outside individuals and shape behaviour. They use the scientific method: form a hypothesis, collect quantitative data, look for patterns and trends, and test for correlation and causation. Good research is objective (free from the researcher’s values) and reliable (repeatable).

Example: Peter Townsend’s Poverty in the United Kingdom (1979) used a large social survey of households to measure how many people lacked items most of society regarded as normal. Its standardised questions allowed comparison between groups — a positivist strength.

What is the interpretivist approach?

Interpretivists take a micro view: society is created through people’s interactions and the meanings and motivations behind them. They use qualitative, in-depth methods to achieve verstehen — Max Weber’s term for empathetic understanding. They accept that research involves some subjectivity, but argue it produces greater validity.

Example: Erving Goffman’s Asylums (1961) was based on fieldwork in a large US psychiatric hospital, where he observed how patients adapted to institutional life. The rich detail about patients’ experiences could not have come from a questionnaire.

How can approaches be combined?

• Triangulation — using several methods to cross-check. Eileen Barker’s The Making of a Moonie (1984) combined participant observation, in-depth interviews and questionnaires to study why people joined the Unification Church.
• Longitudinal studies — following the same people over time. The international Young Lives study, begun in 2002, has followed around 12,000 children in Ethiopia, India, Peru and Vietnam to understand how childhood poverty affects later life. Strengths: shows change and sequence. Limitations: costly, and some participants drop out.

How do sociologists judge research choices?

Concept	Question to ask	O Level example
Bias	Have the researcher’s values affected the questions or conclusions?	A survey on women’s employment funded by a group with a fixed view
Interviewer effect	Does who asks the question change the answer?	A male interviewer asking women about domestic violence
Hawthorne / observer effect	Are people acting differently because they are watched?	Teachers teaching differently when an observer sits in the classroom
Validity	Is this a true picture?	Students saying they study three hours a night when they do not
Reliability	Would the same results come again?	Two researchers using the same questionnaire get similar results
Representativeness	Is the sample typical?	Only urban schools surveyed in a mainly rural country
Generalisability	Can findings apply more widely?	One village studied in depth

What is the difference between primary and secondary, quantitative and qualitative data?

	Strengths	Limitations
Primary data (collected first-hand)	Designed for the research aims; up to date	Time-consuming and costly; access may be difficult
Secondary data (already exists)	Cheap; may cover large populations or the past	Not designed for the research; definitions may differ
Quantitative data (numbers)	Easy to compare, show trends, reliable	Lacks depth; may miss meanings
Qualitative data (words, images)	Rich, valid, shows meanings	Hard to compare; small samples; interpretation may be subjective

How useful are different kinds of secondary evidence?

• Official statistics — for example national census data, such as Pakistan’s 2023 census, which was the country’s first carried out digitally. Strengths: national coverage and regular collection. Limitations: undercounting of some groups, and categories decided by government.
• Historical documents — parish records, colonial reports, old newspapers. They allow study of the past but may be incomplete or written from the viewpoint of those in power.
• Personal documents — diaries, letters, autobiographies. They reveal meaning but may be exaggerated or unrepresentative.
• Digital sources — online forums, social media posts, blogs. Large and current, but hard to verify and not everyone is online.
• Media content — newspapers, television, advertisements. Useful for studying representation, but shaped by the media’s own priorities.

How should you analyse tables, charts and graphs?

1. Read the title, source and date first.
2. Identify exactly what is being measured (percentages or numbers?).
3. Quote figures accurately with units.
4. Describe the overall trend before giving detail.
5. Explain a limitation — sample size, date, missing groups, how terms were defined, or whether a correlation proves causation.

Frequently asked questions

Why do positivists value reliability? Because if results can be repeated by another researcher, they can be checked and treated as scientific evidence.

Are official statistics positivist? They are a favourite positivist source because they are quantitative and large-scale, but interpretivists argue they are socially constructed by the people who collect them.

What does the exam expect in data questions? Accurate identification of information from the source, explanation of an aspect of the research, and explanation of problems with the evidence.

Sources

• Cambridge International, Cambridge O Level Sociology 2251 syllabus for 2025, 2026 and 2027, key questions 1.1 and 1.2 and Details of the assessment (Paper 1 Question 1).
• Studies are named with publication years in the text.

Related pages: O Level positivism and interpretivism revision notes | O Level positivism and interpretivism practice questions | O Level methods revision notes