Information collected by the sociologist themselves for their own purpose.
Methods for gathering primary data
Social surveys
Participant observation
Experiment
Advantage of using primary data is that sociologists may be able to gather precisely the information they need to test their hypothesis
Downfall with primary data
Can often be costly and time consuming
Secondary data is information that has already been collected or created by someone else foe theor own purposes but the sociologists can use it
Sources of secondary data include
Official statistics
Documents
Advantage of using secondary data it is cheap and quick as someone else has already gathered the information
Disadvantage of secondary data those who have produced the data may not be interested in the same question as the sociologist so it may not produced the exact infoinformation they need
Large-scale surveys may employ dozens of interviewers and data-inputting staff and cost a great deal of money, while a small scale project involving a lone researcher using participant observation may be cheaper but take several years to complete
It may be much harder to study a particular group by one method than by another, e.g. a male sociologist studying an all-female group through participant observation
Positivists prefer quantitative data and see sociology as a science, while interpretivists prefer qualitative data and reject the view that sociology can model itself on the natural sciences
The rise of feminism in the 1950s led to a focus on gender inequality and today's environmental concerns have generated interest in 'green' topics such as toxic waste dumping
Although sociologists may wish to study the way in which global corporations make their decisions, this may not be possible because these are made in secret