What is a research technique that involves unbiased selection of participants for different experimental conditions?

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Random assignment involves placing individuals into different experimental conditions in an unbiased and randomized manner, which helps to ensure that each group is as similar as possible before any treatments or interventions are applied. This approach helps to reduce the impact of individual differences or confounding variables, and enhances the internal validity of a study. Correlational sampling involves selecting participants based on their existing characteristics or relationships, rather than randomly assigning them to different conditions. Random sampling involves selecting participants randomly from a larger population, whereas quasi/natural assignment involves placing individuals into different conditions based on preexisting characteristics (e.g., age, sex, diagnosis).

What Is a Research Technique That Involves Unbiased Selection of Participants