To investigate the effects of a particular study of method on student performance two different methods are tried, each with a different group of subjects. I fondly the experimenter know which method is under investigation, the procedure being used in described as:
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Answer:
To investigate the effects of a particular study of method on student performance two different methods are tried, each with a different group of subjects. I fondly the experimenter know which method is under investigation, the procedure being used in described as: single-blind.