Research Design (AQA AS Sociology): Revision Note

Validity and reliability

• Sociological research must be carefully designed to ensure findings are trustworthy and meaningful

• Good research design aims to achieve key principles:

  • Validity

  • Reliability

  • Representativeness

  • Generalisability

  • Objectivity

Validity

• Validity measures whether the method gives a true and meaningful picture of what is being studied

• A valid method gives a true picture of the reality of participants' experiences

• Qualitative methods such as participant observation often have higher validity because they offer deeper, more truthful insights

• In contrast, quantitative methods may overlook the context behind behaviours and responses

Reliability

• Refers to the replicability of research and the consistency of research findings

• A method is reliable if it produces the same results when repeated by other researchers

• In the natural sciences (e.g. physics), experiments are highly reliable because they produce consistent outcomes when repeated

• In sociology, quantitative methods such as structured questionnaires are generally more reliable than qualitative methods such as unstructured interviews

  • E.g. a questionnaire asking fixed questions will yield similar data across researchers

Representativeness and generalisability

Representativeness

• Representativeness refers to whether the sample used in research accurately reflects the wider population being studied

• Since it is usually impractical to study everyone of interest, researchers rely on smaller samples

  • E.g. rather than studying every teacher in the UK, a sociologist might select a sample of 100 teachers whose characteristics mirror those of the broader teaching population

• Representativeness is essential for ensuring that research findings can be generalised to the wider population

• Quantitative methods, such as large-scale questionnaires that use random or stratified sampling, are more likely to produce representative samples

Generalisability

• Generalisability concerns whether the research findings can be applied to the wider population beyond the sample

• The larger and more representative the sample, the more generalisable the findings are

• Sociologists aim for generalisability to make broader claims about social behaviour or attitudes

Objectivity

• Objectivity, closely linked to value freedom, is the principle of keeping personal beliefs, opinions or biases out of the research process

• Researchers must ensure their values do not influence:

  • the way data is collected

  • their interactions with participants

  • how they interpret and analyse findings

  To enhance objectivity, sociologists can:

  • use random sampling to reduce selection bias

  • ask neutral and standardised questions that do not lead participants

  • avoid developing emotional attachments with participants

  • train interviewers to stay impartial and avoid influencing responses during data collection

• Overall, an effective research design allows sociologists to gather data that is reliable, valid and generalisable, while maintaining objectivity and representativeness

• The choice of method should reflect these goals, depending on the research question, sample and practical constraints