Sampling, The aim is to select a representative sample so that generalisations can be made , Sample frame, a list of all the members of the target population , Random sample, every member of the population has an equal chance of being included in the sample, Stratified sampling, if the researcher has a sampling frame that shows the main characteristics of the population, it is possible to ensure that the sample includes the right proportion in each category , Quota sampling, the researcher establishes how many participants are needed in each category and goes looking for them , Systematic sampling, the researcher calculates how many people from each group are required , Snowball sampling , Interviews an individual and then asks them to suggest who else might be interviewed , Volunteer sampling , Invite people to volunteer for the research , Purposive, when the researcher has limited time and/or there is no sampling frame available, they might set out to find people with the characteristics that are relevant to the study , Opportunity/Convenience , easy for the researcher to contact .

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