When two or more groups are present in an experimental design,and in order to help avoid any systematic variation other than that caused by the independent variable on the behavior of interest,the researcher

Question

Quizplus · Accepted Answer

Randomly assigning participants to groups helps to balance out any individual differences that may exist between the participants in each group, making it less likely that any systematic variation in the results will be due to pre-existing differences between the groups. Providing a different independent variable, measuring a different dependent variable, or assigning the same subjects to all groups would not necessarily help to control for systematic variation between groups.

When Two or More Groups Are Present in an Experimental