Examlex
In which of the following research methods does the researcher manipulate the independent variable?
Snowball Sampling
A recruitment technique in research where existing study subjects recruit future subjects from among their acquaintances, creating a "snowball" effect.
Availability Sampling
A non-probability sampling technique where samples are selected based on their availability or ease of access.
Probability Sampling
A sampling method in which every member of the population has a known, non-zero chance of being selected.
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