Random assignment to conditions is used in true experiments to control which of the following threats to internal validity?
A)testing
B)selection
C)history
D)subject attrition

Question

Quizplus · Accepted Answer

Random assignment to conditions helps to control for selection bias by ensuring that participants are assigned to groups in a way that is not influenced by any pre-existing differences in their characteristics or traits. This reduces the likelihood that any observed differences between groups are due to selection bias rather than the experimental manipulation. The other options (testing, history, subject attrition) are not addressed by random assignment and require other controls or methods to address them.

Random Assignment to Conditions Is Used in True Experiments to Control