The internal validity threat that randomization eliminates in an experimental study is
A) selection bias.
B) subject effects.
C) instrumentation.
D) history.

Question

Quizplus · Accepted Answer

Randomization helps to ensure that the experimental and control groups are similar at the start of the study, reducing the risk of selection bias. Subject effects, instrumentation, and history are other threats to internal validity that may still exist even with randomization.

The Internal Validity Threat That Randomization Eliminates in an Experimental