Multiple Groups Researchers often select extreme values of an independent variable because
A)extreme values increase the possibility of detecting a change across conditions.
B)extreme values produce results with greater external validity.
C)extreme values reduce the risk of confounding.
D)intermediate values provide minimal information about how the independent variable affects behavior.

Question

Quizplus · Accepted Answer

Selecting extreme values of an independent variable increases the possibility of detecting a change across conditions, as it creates more contrast between the groups being compared. This can make it easier to identify the effects of the independent variable on the dependent variable.

Multiple Groups Researchers Often Select Extreme Values of an Independent