I'm neither a academic nor familiar with the proper English choice of words regarding research. However, I would really like to know a few things about the process of doing a research with people itself as a subject, so that I can apply it to my work.I would like to know how normally the participants are divided into multiple groups, so that the results can be scientifically compared to each other.I understand this can have detailed answers, I am really looking for a abstract method to achieve this such that I have meaningful results.
How are research participants normally divided into equal groups to allow scientific comparison?
experimental psychology;methodology