Random Sampling, where participants are selected from the sampling frame and everyone has an equal chance of being selected, Opportunity Sampling, where participants are selected at the researcher’s convenience, without knowing any details about the sample in advance, Systematic Sampling, where every nth person on a list is selected by the researcher, e.g. every 3rd house on a street, or every 5th person on a register., Stratified Sampling, where the target group is divided into subgroups (or strata), e.g. by sex, and then the participants are selected randomly from each subgroup., Self-selected Sampling, where participants volunteer (select themselves) for research, Snowball Sampling, where participants are initially recruited by the psychologist and then those participants recruit further participants from people they know

Sampling techniques

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