Bi irinse to se koko fun awon asesayensi alawujo, awon irojinle je mo ijiyan lati atijo lori awon oro-onaise to fesemule ati tosegbarale julo (f.a.. 
Kocicipants are randomly assigned to different groups which either serve as controls—acting as reference points because they are tested with regard to the deflowering variable, yanjúit without having been exposed to any independent variables of interest—or receive one or more inspectments.. 