Independent variable manipulations
A) should be pretested for feasibility.
B) should be chosen carefully because they may interfere with the statistical procedures.
C) help determine the level of constraint of the dependent measures.
D) should be used only when matched groups are not available.
Question 2
The variables in a research project should be
A) clearly identified and operationally defined.
B) randomly assigned to conditions.
C) randomly selected from the population of variables.
D) double checked with appropriate statistical procedures.
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