What is one of the primary purposes of using inclusion criteria in research?

One of the primary purposes of using inclusion criteria in research is to define the target population. Inclusion criteria are specific characteristics that participants must possess to be eligible for a study. By clearly outlining these criteria, researchers can ensure that the sample accurately represents the population they wish to study, making the results more generalizable and relevant. Defining the target population allows researchers to focus on the individuals who are most pertinent to their research question, leading to more effective and meaningful findings. This clarity helps in streamlining the recruitment process, ultimately enhancing the validity of the research outcomes.