in an experiment when neither the participants nor the researchers know who belongs to the control group and who belongs to the experimental group. Only after all the data have been recorded (and in some cases, analyzed) do the researchers learn which individuals are which.
A. Single-blind procedure
B. Inferential statistics
C. Double-blind procedure
D. Measure of central tendency
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a research method in which an investigator manipulates one or more factors (independent variables) to observe the effect on some behavior or mental process (the dependent variable). By random assignment of participants, the experiment aims to control for other relevant factors
A. Placebo effect
B. Mode
C. Experimental group
D. Experiment
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