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Sociology 2251 · Chapter 1

Research Methods

Positivist and interpretivist approaches, primary and secondary data, how a piece of research is designed, sampling, the main methods, types of question, practical issues and research ethics.

Written for the 2025–2027 syllabus · 12 min read

Sociology studies how people behave in groups, and research methods are the tools sociologists use to find out. Every Paper 1 starts with a research methods question, and the other five topics all rely on these ideas. Learn the vocabulary here first.

1.1 How do sociologists approach the study of society?

Two approaches

PositivistInterpretivist
Treats society asa social fact: it exists outside us and shapes us (a macro view)something people create through their actions and meanings (a micro view)
Methodthe scientific method: measure, compare, testtry to understand the person's point of view
Dataquantitative (numbers, statistics)qualitative (words, feelings, reasons)
Aimfind patterns and trends, cause and correlationunderstand meanings and motivations
Strengthreliable, objective, large samplesvalid, rich, in-depth detail
Weaknessmay lack validity, ignores feelingssubjective, hard to repeat, small samples
Typical methodsquestionnaires, structured interviews, official statisticsunstructured interviews, participant observation, case studies

Social facts (a term from Durkheim) are things such as the suicide rate or the divorce rate. They can be counted, so positivists treat them like facts in science.

Verstehen is a German word meaning "understanding". Interpretivists try to see the world through the eyes of the people they study, rather than only measuring what they do.

Correlation and causation

A correlation is a link between two things, such as hours of study and exam marks. A cause is when one thing makes the other happen. A correlation does not prove a cause: ice-cream sales and sunburn both rise in summer, but one does not cause the other. The weather is a third factor.

Combining methods

  • Triangulation means using two or more methods to study the same thing, then comparing the results. If they agree, the findings are more trustworthy.
  • A longitudinal study follows the same people over a long time (for example, a group of children followed from age 7 to 21) to see how things change.

Evaluating research

TermWhat it means
Biasthe researcher's own opinions shaping the results
Interviewer effectthe interviewer's age, gender, ethnicity or manner changes how the person answers
Hawthorne / observer effectpeople change their behaviour because they know they are being watched
Validitythe research shows a true picture of what is being studied
Reliabilityanother researcher repeating the research would get the same results
Representativenessthe sample has the same make-up as the group it stands for
Generalisabilitythe findings can be applied to the wider population

1.2 What types of data and evidence do sociologists use?

Primary and secondary data

  • Primary data is collected by the researcher for their own study (a survey they carried out). It fits the aim exactly but costs time and money.
  • Secondary data already exists (collected by someone else). It is quicker and cheaper, but it may not fit the study or may be out of date or biased.

Quantitative and qualitative data

  • Quantitative: numbers, statistics, percentages. Easy to compare and show in graphs, but gives little detail on why.
  • Qualitative: words, quotations, descriptions. Gives depth and meaning, but is harder to compare and analyse.

Secondary sources

SourceStrengthLimitation
Official statistics (government figures such as crime, census, exam results)free, large, cover long periodscollected for the government's purposes, may hide unreported cases, definitions can change
Historical and personal documents (diaries, letters, photographs)give an insider's view of the pastmay be biased, unrepresentative, or not authentic
Digital sources (websites, social media, online forums)cheap, up to date, large amounts of dataanyone can post, so accuracy and representativeness are doubtful
Media content (newspapers, TV, adverts)show how groups are representedreflect the owners' views and may exaggerate

Reading tables, charts and graphs

When a question gives a table, chart or graph:

  1. Read the title and the labels on the axes or columns.
  2. Pick out the highest, lowest and any trend over time.
  3. Quote figures (with units) in your answer.
  4. Say what the source cannot tell you (for example, why the figures changed).

1.3 How do sociologists investigate society?

The stages of research design

  1. Selection of topic: what to study.
  2. Aims: what the research wants to find out.
  3. Hypothesis: a testable prediction, such as "Pupils who study with friends achieve higher grades". Positivist studies usually have one; interpretivist studies usually have only aims.
  4. Target population: the whole group being studied (all Year 11 pupils in a country).
  5. Methods: which methods to use.
  6. Operationalisation: turning an idea into something measurable (for example, "social class" measured by parents' jobs and income).
  7. Pilot study: a small trial run to test the method and fix problems before the real study.

Sampling

A sampling frame is the list of people the sample is drawn from (a school register). A sample is a smaller group chosen to represent the target population.

TechniqueHow it worksStrengthLimitation
Randomeveryone has an equal chance (names drawn from a hat)fair, avoids biasmay not include every group; needs a full list
Systematicevery nth person on the list (every 10th)simple and quickcan miss a pattern in the list
Stratifiedthe population is divided into groups (strata), then a random sample is taken from each in the right proportionsrepresentative of the groupsneeds detailed information, takes time
Snowballone participant introduces othersgood for hidden or hard-to-reach groupsnot representative; depends on contacts
Quotathe researcher fills a set number from each group (50 men, 50 women) by choosing themquick, cheapresearcher bias in who is chosen

Primary research methods

MethodWhat it isStrengthsLimitations
Surveyquestions put to a large samplelarge, quantitative, representativelittle depth
Questionnairewritten questions the respondent fills incheap, quick, large sample, anonymouslow response rate, closed questions limit answers, respondents may lie
Structured interviewfixed questions asked by an interviewerreliable, easy to comparelittle flexibility
Semi-structured interviewsome set questions plus follow-up probesbalance of reliability and depthinterviewer effect, takes time
Unstructured interviewa conversation with a few themeshigh validity, rich detailtime-consuming, hard to repeat, small sample
Group interview (focus group)a discussion among several peopleshows how opinions formsome members may dominate or follow the group
Participant observationthe researcher joins the groupreal behaviour, high validitytakes a long time, risk of going native (losing objectivity), may be dangerous
Non-participant observationthe researcher watches without joiningless involvement, can record morestill the observer effect
Overtthe group knows it is being observedethical (consent)Hawthorne effect
Covertthe group does not knownatural behaviourdeception, no consent, risky

Types of question

TypeExampleGood forLimitation
Closed"Do you own a phone? Yes / No"easy to count, quickno explanation
Open"Why do you use social media?"detail, own wordsharder to analyse
Multiple choice"Which is your main use? A, B, C, D"easy to analysemay not include the person's real answer
Scaled"Rate from 1 to 5 how much you agree"measures strength of opinionpeople avoid the extremes; the points mean different things to different people

Practical and theoretical issues

  • Researcher perspective: a positivist will prefer questionnaires and statistics; an interpretivist will prefer observation and unstructured interviews.
  • Access to the sample: some groups (gangs, wealthy people) are hard to reach or will not cooperate.
  • Response rate: the percentage who reply. A low rate (common with postal or online questionnaires) leaves the sample unrepresentative.
  • Funding/cost and time: large samples and long studies need more of both.

Ethical issues

IssueWhat it means
Informed consentpeople agree to take part knowing what the study involves (under-age participants need a parent's consent)
Privacy/confidentialitypersonal details are kept private and results are anonymous
Deceptionmisleading people about the purpose of the research
Prevention of harmno physical or psychological harm to participants or the researcher
Legalitythe research must not break the law

Examples to quote: Rosenthal and Jacobson (1968), a field experiment on teachers' expectations (Pygmalion in the Classroom); Zimbardo (1973), the prison experiment, where participants conformed to the roles of guard and prisoner and some suffered distress, so it raises questions of harm.

Answering Paper 1

  • "Identify"/"State": give a short point, no explanation.
  • "Describe two...": give two points, each developed with a sentence.
  • "Explain...": give the point and the reason.
  • "Describe two strengths and two limitations": four separate points, linked to the method named.
  • "To what extent..." (the 15-mark question): argue both sides, link to the source, and finish with a judgement.
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Practise this chapter

Every past-paper question on these topics, with the mark scheme.