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., Quota sampling, where the target population is divided into subgroups, e.g. by sex, and the participants are chosen from each subgroup at the convenience of the researcher., 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, Event Sampling, where participants are observed by the psychologist, who records a specific behaviour each time it occurs to create a total score., Time Sampling, where the psychologist observes and records behaviour (such as a score) at specific time intervals.

Sampling techniques

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