an error in choosing the individuals or groups to take part in a study. ideally, the subjects in a study should be very similar to one another and to the larger population from which they are drawn (for example, all individuals with the same disease or condition). if there are important differences, the results of the study may not be valid.
出典:Wiktionary
出典:『Wiktionary』 (2026/03/25 22:00 UTC 版)
selection bias (countable and uncountable, plural selection biases)
出典:Wikipedia
出典:『Wikipedia』 (2011/07/20 05:20 UTC 版)
Selection bias is a statistical bias in which there is an error in choosing the individuals or groups to take part in a scientific study. It is sometimes referred to as the selection effect. The term "selection bias" most often refers to the distortion of a statistical analysis, resulting from the method of collecting samples. If the selection bias is not taken into account then any conclusions drawn may be wrong.