How should a researcher select subjects for a study in order to generate results that are generalizable

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In order to generate results that are generalizable, subjects should be carefully chosen so that they are a representative sample of the population. This means that subjects should be chosen from a variety of geographical areas and socio-economic classes to ensure a diverse sample. Additionally, the sample should be large enough to provide statistically significant results. Avoiding selecting subjects based on their ability to choose a group or selecting subjects from the same population can result in non-generalizable results. Similarly, selecting subjects from a WEIRD (Western, Educated, Industrialized, Rich, and Democratic) society can result in non-generalizable results as the sample may not represent the population as a whole.

How Should a Researcher Select Subjects for a Study in Order