Paper 1 · Research Aptitude
Control groups and experimental groups are exactly the same except for the
ADependent variable
BIndependent variable ✓ Correct
CExtraneous variables
DReplication variables
Correct answer: (B) Independent variable — Control and experimental groups are the same except for the independent variable, so that is the answer.
Explanation
★Control and experimental groups are the same except for the independent variable, so that is the answer.
★The two groups are made alike in every respect that could affect the result.
★The one deliberate difference is the independent variable, the treatment given only to the experimental group.
★The dependent variable is measured in both groups and is not the arranged difference.
★Extraneous variables are kept the same across both groups, not made to differ.
★There is no replication variable of this kind, so the groups differ only in the independent variable.
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