PSYC 217 Lecture Notes - Lecture 27: Nonprobability Sampling, Snowball Sampling, Cluster Sampling
Document Summary
Two broad categories of techniques that are used to get people into our studies. Probability sampling: techniques where students are drawn at random - thus they are more likely to be representative of population - high generalisability. In profs; all info is deleted so he picks from the subgroups - the ta groups: stratified random sampling: Id subgroups from population, id people in those population that belong to he subgroups, randomly draw samples to reflect proportion in population. Non-probability sampling: not drawn at random, easy and convenient, low generalisability: there is no random selection - you"re targeting people. Convenience sampling - whenever and wherever is easiest for you. Purposive sampling: you are targeting people who fit a certain criterion or set of criteria and recruiting them for study - like they must smoke, speak english, etc. Snowball sampling: asking participants to recommend or ask other people to participate in the study.
