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A field experiment is a type of field study where the researcher actively manipulates an independent variable in a natural setting while controlling extraneous variables as much as possible. Depending on the level of control achieved, these studies can yield high levels of both internal and external validity.

Field Experiment

In field experiments where participants are encountered naturally rather than formally recruited, researchers must establish a well-defined set of selection rules before data collection begins. These explicit criteria dictate exactly who is included in the study, preventing intentional or unintentional selection bias by the experimenter.

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