snøballkædeudvælgelse

Snøballkædeudvælgelse, a term originating from Scandinavian languages, refers to a specific method of data selection or sampling. The literal translation of the components suggests "snowball chain selection." This technique is a type of non-probability sampling where existing study subjects recruit future subjects from among their acquaintances.

The process typically begins with a small group of initial participants who meet the study's criteria. These individuals are then asked to refer other potential participants who also fit the inclusion requirements. This referral process continues, creating a chain that resembles a snowball rolling downhill and gathering more snow. As the snowball grows, the sample size increases.

Snøballkædeudvælgelse is particularly useful for reaching populations that are hard to access through conventional sampling methods. This can include marginalized groups, hidden populations, or individuals with specific, rare characteristics. Examples might include drug users, undocumented immigrants, or members of secretive communities.

However, this method has limitations. The sample may not be representative of the entire target population because the selection is based on social networks rather than random chance. This can lead to sampling bias, as individuals within a particular network might share similar characteristics or opinions. Researchers must be aware of these limitations when interpreting the results obtained through snøballkædeudvælgelse. Despite its drawbacks, it remains a valuable tool for exploratory research and for gaining insights into hard-to-reach populations.