Which of the following refers to the improper assignment of test units to treatment conditions?
A) randomization
B) matching
C) overcontrolling
D) statistical regression
E) selection bias

Question

Quizplus · Accepted Answer

Selection bias refers to the improper assignment of test units to treatment conditions. Randomization and matching are methods used to prevent selection bias. Overcontrolling refers to a situation where the researcher exerts too much control over the study variables, which may limit generalizability. Statistical regression is a phenomenon where extreme scores on a variable tend to regress towards the mean on subsequent measurements, which is not related to the improper assignment of test units to treatment conditions.

Which of the Following Refers to the Improper Assignment of Test