Question

When subjects in an experimental group put a puzzle piece in the wrong place, the experimenter unconsciously tapped his feet. the experimenter did not tap his feet when subjects in the control group placed a puzzle piece in the wrong place. one method to eliminate the tapping of the experimenter is by instituting: (1 point)?

Answer 1

I believe the answer is: The double-blind Procedure

In a The double-blind Procedure, both the researchers and experimental subjects do not know which subjects are receiving treatment and which subjects are not.
The purpose of this procedure is to ensure that the researchers remain unbiased when analyzing the data taken from the subjects.