A true experiment allows the establishment of nonspuriousness through ______.
A)using two comparison groups
B)controlling when treatment occurs
C)random assignment into two or more comparison groups
D)documenting the conditions under which change occurs

Question

Quizplus · Accepted Answer

Random assignment into two or more comparison groups allows for the establishment of nonspuriousness by ensuring that any differences between groups are due to the manipulation of the independent variable rather than pre-existing differences between groups. Controlling when treatment occurs or documenting the conditions under which change occurs can help to identify factors that might affect the outcome variable but do not establish nonspuriousness. Using two comparison groups can be helpful for identifying specific sources of variation but does not alone establish nonspuriousness.

A True Experiment Allows the Establishment of Nonspuriousness Through ______