Assigning subjects randomly to the experimental and comparison groups ensures that this does not affect the assignment of subjects to groups.
A)systematic bias
B)spuriousness
C)field effects
D)nonequivalence

Question

Quizplus · Accepted Answer

Random assignment ensures that there is no systematic bias in the selection of participants for each group. This means that any differences observed between the groups are more likely to be due to the intervention being tested rather than other factors that might affect group assignment. Spuriousness refers to a situation where there are apparent differences between groups, but these are not actually caused by the intervention being tested. Field effects and nonequivalence are related to potential confounding factors that could affect the outcome of the study, but are not directly related to group assignment.

Assigning Subjects Randomly to the Experimental and Comparison Groups Ensures