The requirement that the only difference between experimental conditions in a formal experiment is the variable of interest is referred to as:
A) control grouping.
B) experimental control.
C) placebo control.
D) random assignment.

Question

Quizplus · Accepted Answer

Experimental control refers to the requirement that the only difference between experimental conditions is the variable of interest. Control grouping involves the use of a control group to compare against the experimental group. Placebo control involves the use of a placebo treatment to control for the placebo effect. Random assignment refers to the random assignment of participants to experimental conditions.

The Requirement That the Only Difference Between Experimental Conditions in a Formal