Participants are randomly assigned to different groups which either serve as controls--acting as reference points because they are tested with regard to the dependent variable, albeit without having been exposed to any independent variables of interest--or receive one or more treatments.. 
jẹ́ òṣèré tó gba ẹ̀bùn àkàDemi fún Òṣèré Ọkùnrin Dídárajùlọ 2K.Ìtọ́kasí Àwọn Ọjọ́ìbí ni Àwọn ẹlẹ́bùn ADemi Ọkùnrin Òṣèré Dídárajùlọ 2k.. 