Given below are two statements, one labelled as Assertion A and the other as Reason R. In the light of the above statements, choose the most appropriate answer from the options given below.

Assertion (A):Experimenter's bias is a real issue at different phases of research.

Reason (R):A researcher can influence the results of a study by mistakes in observation and data entry, either intentionally or otherwise.

ABoth A and R are correct and R is the correct explanation of A ✓ Correct

BBoth A and R are correct but R is not the correct explanation of A

CA is correct but R is not correct

DA is not correct but R is correct

Correct answer: (A) Both A and R are correct and R is the correct explanation of A

Explanation

Both statements are correct and Reason R correctly explains Assertion A about experimenter's bias.

Assertion A holds since experimenter bias can arise at the design, observation and analysis stages.

Reason R holds since errors in observation and data entry, deliberate or not, can distort results.

Such mistakes are the very mechanism by which bias enters the study.

Because R names that mechanism, it explains A.

Double blind procedures help guard against experimenter bias.

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