Describe the three ways that researchers can manipulate an independent variable and give an example of each one.
What will be an ideal response?
Ans: The three ways that researchers can manipulate an independent variable are: the presence or absence technique, the amount technique, and the type technique. In the presence or absence technique one group gets the treatment and the other group does not. With the amount technique members of different groups receive different amounts of the independent variable. Finally, with the type technique the groups differ in terms of the conditions presented to the comparison groups. Students’ examples will vary.
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