Control is important in an experimental research study for which of these reasons?
a. It ensures maintenance of participant confidentiality.
b. It introduces one or more constants into the experimental situation.
c. It prevents data collection from extending beyond the original time specified for the study.
d. It ensures a cause-and-effect relationship between independent and dependent variables.
ANS: B
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A Participant confidentiality is protected by the researcher's coding of subjects to mask their identity.
B Control is essential to minimize the effects of extraneous variables on the interaction of the identified independent and dependent variables. Control of variables makes it possible to explain a study's findings with accuracy.
C Control in an experimental design is not related to the time period of the study.
D Control does not ensure a cause-and-effect relationship between the treatment variable and the outcome.
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