Non-Probability Sampling Methods

Availability sampling

A non-random sampling method used in qualitative research where a convenient or available sample is created.

Convincing sampling

A method creating available samples where generalizability is not the goal, used to gather basic opinion information.

Selective-bias

Occurs when a sample is not representative of the population due to subjective selection, leading to skewed results.

Quota sampling

A technique ensuring equal representation of various subgroups within a population for comprehensive perspective understanding.

Purposive sampling

A non-random sampling technique where subjects are selected based on specific characteristics or purpose of the research.

Snowball sampling

A non-random sampling method where existing study subjects recruit future subjects from among their acquaintances.