Selection Bias
2 min read
Selection bias is the bias introduced by the selection of individuals, groups or data for analysis in such a way that proper randomization is not achieved.
Statistical Biases
/ Sampling bias (related)
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Explore 3 cognitive biases related to this topic.
Sampling Bias
2 min read
Sampling bias is a bias in which a sample is collected in such a way that some members of the intended population have a lower or higher sampling probability than others.
Statistical Biases
/ Ascertainment bias
Observer-Expectancy Effect
2 min read
The observer-expectancy effect (also called the experimenter-expectancy effect, observer bias, observer effect, or experimenter effect) is a form of reactivity in which a researcher's cognitive bias causes them to subconsciously influence the participants of an experiment.
Social Biases
/ Experimenter bias