Revision Notes
O Level Sociology: Research Methods, Identity and Inequality — Revision Notes
Condensed recall notes on research methods, culture and socialisation, and social class, gender and ethnic inequality for Cambridge O Level Sociology 2251.
- Subject
- Sociology
- Level
- O LEVELS
- Topic
- Paper 1 – Research Methods, Identity and Inequality
- Author
- Marlbridge Academic Team
- Updated
Aligned to Cambridge O Level Sociology (2251), 2025-2027. Official specification .
Condensed for the final weeks. For the full explanation, use the Research Methods, Identity and Inequality study guide.
Research methods
Primary data is collected by the researcher; secondary already exists. Quantitative is numerical; qualitative is descriptive.
| Concept | Meaning |
|---|---|
| Reliability | Repeating the study gives the same result |
| Validity | It gives a true picture |
| Representativeness | The sample reflects the wider population |
Quantitative methods are strong on reliability and weak on validity; qualitative methods are the reverse. That single trade-off answers most methods questions.
| Method | Strengths | Weaknesses |
|---|---|---|
| Questionnaire | Cheap, large samples, reliable, easily analysed | Low response rate, low validity, no chance to explain |
| Structured interview | Reliable, comparable, better response rate | Interviewer bias, limited depth |
| Unstructured interview | Valid, detailed, flexible | Time-consuming, unreliable, small sample |
| Participant observation | Very valid, reveals real behaviour | Hawthorne effect, going native, ethically difficult |
| Official statistics | Cheap, large-scale, comparable | Socially constructed by the state |
Sampling: random, systematic, stratified, quota, snowball (for hidden groups), opportunity. The sampling frame is the list drawn from; its absence often forces a non-random method.
Pilot study — a small-scale trial run to find problems with wording, timing or procedure before the main study.
Ethics: informed consent, confidentiality, protection from harm, no deception, right to withdraw.
Culture, socialisation and identity
- Culture — the whole way of life of a group: norms, values, roles, beliefs.
- Norms are expected behaviours; values are beliefs about what matters.
- Primary socialisation — family, early childhood. Secondary socialisation — school, peer group, media, religion, workplace.
- Sanctions — positive or negative, formal or informal.
- Ascribed status is fixed at birth; achieved status is earned.
Nature versus nurture: the sociological evidence is cross-cultural variation in norms and gender roles, and feral children cases where individuals raised without human contact fail to develop language or normal social behaviour.
Subculture — a group with distinct norms within a wider society. Counter-culture — one actively opposed to the mainstream.
Inequality
Social class:
- Life chances — opportunities for health, education, housing and income. Class predicts them more strongly than any other single factor.
- Social mobility — intergenerational compares a person with their parents; intragenerational compares stages of one person’s own career.
- Open societies allow movement by merit; closed societies, such as caste systems, fix status at birth.
- Absolute poverty is lacking the necessities for survival; relative poverty is falling below the standard considered acceptable in that society — which is why relative poverty exists in wealthy countries.
- Cycle of deprivation — poor housing and diet → poor health and education → low-paid work → poverty in the next generation.
Explaining class inequality — four perspectives: Functionalists (Davis and Moore) see inequality as functional and inevitable — the most important roles require the greatest talent and longest training, so higher rewards act as an incentive, and society is broadly a meritocracy. Marxists locate inequality in the ownership of the means of production: the bourgeoisie exploit the proletariat by extracting surplus value from their labour, and ideology transmitted through education, religion and the media produces false consciousness, so the working class accept a system that disadvantages them. Weberians argue class position depends not only on property but on market situation — the skills and qualifications a person brings to the labour market — and added status and party as separate dimensions, making inequality multi-dimensional rather than a simple two-class model. Feminists argue inequality is structured by patriarchy as well as class, with women concentrated in low-paid, part-time work and carrying a dual burden of paid and domestic labour.
Gender: the glass ceiling blocks women’s promotion; horizontal segregation concentrates them in particular occupations and vertical segregation at lower levels. Causes: gender socialisation, domestic and caring responsibilities, discrimination, interrupted careers. Changes: equal-pay laws, girls’ educational success, changing attitudes.
Ethnicity: discrimination in employment and housing, institutional racism, negative media representation. Ethnic disadvantage overlaps heavily with class disadvantage, and much of the apparent ethnic effect narrows once class is accounted for — a qualification worth making.
Age: the young and the old both face distinct disadvantages — youth unemployment and low pay at one end, ageism and pension poverty at the other.
Exam traps
- Confusing reliability with validity.
- Confusing absolute with relative poverty.
- Confusing ascribed with achieved status.
- Confusing intergenerational with intragenerational mobility.
- Evaluating a method in the abstract rather than for the specific topic.
- Giving only one side when evaluation requires both plus a judgement.
Self-test
- Distinguish reliability from validity, and say which methods favour each.
- What is a sampling frame, and why does its absence matter?
- Distinguish absolute from relative poverty.
- Explain the cycle of deprivation.
- Why is it difficult to separate ethnic from class disadvantage?
Answers: 1. Reliability is getting the same result on repetition — favoured by quantitative methods; validity is giving a true picture — favoured by qualitative methods. 2. The list of the population from which a sample is drawn; without one, random or systematic sampling is impossible, so a non-random method such as snowball or opportunity sampling must be used. 3. Absolute poverty is lacking the basic necessities for survival; relative poverty is falling below the standard of living considered acceptable in that particular society. 4. Poor housing and diet cause poor health and educational underachievement, leading to low-paid insecure work, which reproduces the same conditions for the next generation. 5. Ethnic minority groups are disproportionately represented in lower socio-economic positions, so much of the apparent ethnic effect narrows once social class is controlled for.
Related resources
-
Practice Questions
IGCSE Sociology: Research Methods and Inequality — Practice Questions
Original exam-style practice questions with full worked answers on research methods, sampling, social class, gender and ethnic inequality.
Sociology · Cambridge · IGCSE
-
Revision Notes
IGCSE Sociology: Research Methods, Identity and Inequality — Revision Notes
Condensed recall notes on research methods, sociological perspectives, socialisation, identity, and social class, gender and ethnic inequality for Cambridge IGCSE Sociology 0495.
Sociology · Cambridge · IGCSE
-
Study Guides
IGCSE Sociology: Research Methods, Identity and Inequality (Cambridge 0495)
Research methods, identity (self and society), and social stratification and inequality -- the full content of Paper 1 for Cambridge IGCSE Sociology 0495, 2025-2027 series.
Sociology · Cambridge · IGCSE
Related articles
-
curriculum guides
Choosing subjects at IGCSE and A Level
How subject choices at 14 and 16 affect university options later, and how to keep pathways open without overloading a timetable.
28 July 2026
-
study skills
How to revise for a science examination
Most science revision fails because it rereads notes instead of retrieving them. A practical method for revising physics, chemistry and biology in the weeks before a paper.
14 July 2026
Working through Sociology? Tutoring covers the same material with a teacher.
Find Learning Support