Biased assignment
A)increases error variance.
B)is a particular problem in within-subjects designs.
C)eliminates confounding.
D)undermines internal validity.

Question

Quizplus · Accepted Answer

Biased assignment undermines internal validity because it introduces systematic differences between groups that can confound the results, making it difficult to determine if the observed effects are due to the independent variable or the bias in assignment.

Biased Assignment