Two Matched Groups Researchers will always create treatment groups of equal size if they use ____ to randomly assign subjects to treatment conditions.
A)a random number table
B)across subjects counterbalancing
C)block randomization
D)subject-by-subject counterbalancing

Question

Quizplus · Accepted Answer

Block randomization ensures equal size treatment groups by dividing the total sample size into blocks and ensuring equal allocation of subjects to each treatment group within each block. This method reduces the chance of unequal group sizes occurring by chance, making it a reliable technique for creating matched groups. Random number tables are a form of simple randomization that do not guarantee equal group sizes, while subject-by-subject counterbalancing and across-subjects counterbalancing are techniques used within a single group rather than for creating matched groups.

Two Matched Groups Researchers Will Always Create Treatment Groups of Equal