The independent variable is the variable that is manipulated by the experimenter. An example of an independent variable in psychology: In an experiment on the impact of sleep deprivation on test ...

Controlled variables – The variables that scientists keep the same during an experiment to make sure that a test is fair. Dependant variables – The variable that a scientist measures or observes.

Sorting by the second CONTROL variable continues to alternate between ascending and descending sorting throughout all levels of the first CONTROL variable. If there is a third CONTROL variable, the ...