Categories English One way to control extraneous variables is to hold them Post author By esimpk Post date December 8, 2021 A: Constant B: Unchanged C: Simple D: Fixed ← Once researchers have decided which variable to study, they must be concerned about the influence or effect of other variables that exist, such variable are usually called → Student thought history by a teacher of a same gender will like the subject more than student thought history by a teacher of different gender . This statement shows