To investigate the effects of a particular study method on student performance, two different methods are tried, each with a different group of subjects. If only the experimenter knows which method is under investigation, the procedure being used is described as

To investigate the effects of a particular study method on student performance, two different methods are tried, each with a different group of subjects. If only the experimenter knows which method is under investigation, the procedure being used is described as

a. double-blind.
b. single-blind.
c. self-fulfilling prophesy.
d. representative sampling.

Because the experimenter knows which method is under investigation and the subjects do not, the procedure is single blind.
Double-blind would be when the subject and experimenter do not know which method is under investigation.
A self-fulfilling prophecy is when a subject does what is expected because of a prophecy.
A representative sample is when a small quantity represents something of much larger proportions.


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